Note 7 - Notes Payable (Details Textual) - USD ($)													1 Months Ended												3 Months Ended		6 Months Ended	12 Months Ended
		Mar. 31, 2022	Dec. 20, 2021	Dec. 10, 2021	Nov. 17, 2021	Oct. 31, 2021	May 11, 2021	Mar. 23, 2021	Mar. 03, 2021	Nov. 13, 2020	Oct. 30, 2020	Sep. 02, 2020	Nov. 30, 2023	Nov. 30, 2022	Feb. 28, 2022	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Feb. 28, 2021	Nov. 30, 2020	Jul. 30, 2020	Dec. 31, 2021	Jun. 30, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument, Face Amount																$ 105,000,000									$ 105,000,000			$ 105,000,000
Long-term Debt, Total																229,379,000									229,379,000			229,379,000	$ 16,531,000
Gain (Loss) on Extinguishment of Debt, Total																												1,134,000	(0)
Long-term Debt, Gross																$ 241,982,000									$ 241,982,000			$ 241,982,000	$ 17,434,000
Common Stock, Par or Stated Value Per Share (in dollars per share)																$ 0.001									$ 0.001			$ 0.001	$ 0.001
Exchange Agreement to Reduce Principal on Seller-financed Note Payable [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)																				155,763
Debt Conversion, Original Debt, Amount																				$ 1,000,000
Exchange Agreement to Partially Pay Off Note Payable [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)																	113,636	100,000	83,333		248,509
Debt Conversion, Original Debt, Amount																	$ 250,000	$ 250,000	$ 250,000		$ 1,000,000
Exchange Issuance of Stock for Prepayment of Second Note Payable [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)																454,545	454,545	400,000	333,333
Debt Conversion, Original Debt, Amount																$ 1,000,000.0	$ 1,000,000.0	$ 1,000,000.0	$ 1,000,000
Seller Financed Notes Payable, Two [Member]
Long-term Debt, Total																													$ 1,500,000
Unsecured Debt [Member] | Streeterville Capital, LLC [Member]
Debt Instrument, Face Amount								$ 10,700,000
Debt Instrument, Periodic Payment, Total								$ 1,000,000
Debt Instrument, Interest Rate, Effective Percentage								19.60%
Debt Instrument, Interest Rate, Stated Percentage								9.00%
Debt Instrument, Term (Month)								18 months
Debt Instrument, Unamortized Discount, Total								$ 1,000,000.0
Long-term Debt, Gross																7,200,000									$ 7,200,000			$ 7,200,000
Unsecured Promissory Note With Kurt A Johnson [Member]
Debt Instrument, Face Amount				$ 1,090,000	$ 34,256,000
Debt Instrument, Interest Rate, Stated Percentage				6.00%
Unsecured Promissory Note With Tidal Power Group [Member]
Debt Instrument, Face Amount					$ 51,384,000
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Unsecured Promissory Note With Kurt A Johnson 2 [Member]
Debt Instrument, Face Amount				$ 1,090,000
Debt Instrument, Interest Rate, Stated Percentage				6.00%
Reduction in Stock Shares in Exchange for Debt (in shares)				400,000
Financing Note [Member]
Long-term Debt, Gross	[1]															1,357,000									1,357,000			1,357,000	1,163,000
Paycheck Protection Program CARES Act [Member]
Proceeds from Issuance of Long-term Debt, Total																													1,900,000
Debt Instrument, Decrease, Forgiveness																										$ 1,900,000
Long-term Debt, Gross	[2]															$ 0									$ 0			$ 0	1,152,000
Paycheck Protection Program CARES Act [Member] | Gibson Technical Services, Inc. [Member]
Long-term Debt, Total																										$ 1,400,000	$ 1,400,000
Paycheck Protection Program CARES Act [Member] | Liabilities Held-for-sale [Member]
Long-term Debt, Total																													$ 800,000
Seller Financed Notes Payable, One [Member]
Debt Instrument, Interest Rate, Stated Percentage																6.00%									6.00%			6.00%
Debt Instrument, Term (Month)																													18 months
Long-term Debt, Total																$ 5,000,000			5,000,000						$ 5,000,000			$ 5,000,000	$ 5,000,000
Repayments of Debt						$ 1,000,000			$ 1,000,000											1,000,000
Gain (Loss) on Extinguishment of Debt, Total																				700,000
Seller Financed Notes Payable, One [Member] | Subsequent Event [Member]
Repayments of Debt		$ 3,000,000
August 2021 Seller-financed Notes Payable [Member]
Debt Instrument, Face Amount																				$ 2,000,000.0
Debt Instrument, Interest Rate, Stated Percentage																				6.00%
Estimated Market Interest Rate on Which Debt Instrument is Based																				10.00%
Debt Instrument, Unamortized Discount, Total																				$ 48,000
Seller Financed Notes Payable, Two [Member]
Debt Instrument, Term (Month)																												36 months
Vehicle and Equipment loans [Member]
Long-term Debt, Gross	[3]															$ 222,000									$ 222,000			$ 222,000	195,000
Vehicle and Equipment loans [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage																5.74%									5.74%			5.74%
Vehicle and Equipment loans [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage																8.99%									8.99%			8.99%
Non-Recourse Payable Agreement [Member]
Debt Instrument, Face Amount																$ 9,450,000									$ 9,450,000			$ 9,450,000
Long-term Debt, Total																6,601,000									6,601,000			6,601,000
Debt Instrument, Unamortized Discount, Total																2,450,000									2,450,000			2,450,000
Long-term Debt, Gross	[4]															8,269,000									8,269,000			8,269,000	2,699,000
The Convertible Notes Payable [Member]
Debt Instrument, Face Amount										$ 2,200,000
Debt Instrument, Periodic Payment, Total										$ 250,000
Debt Instrument, Interest Rate, Effective Percentage										29.00%
Debt Instrument, Interest Rate, Stated Percentage										10.00%
Debt Instrument, Term (Month)										18 months
Gain (Loss) on Extinguishment of Debt, Total																						$ (250,000)
Debt Instrument, Unamortized Discount, Total										$ 200,000
Long-term Debt, Gross																700,000									700,000			700,000
Common Stock, Par or Stated Value Per Share (in dollars per share)										$ 0.001
Proceeds from Convertible Debt										$ 2,200,000
Debt Instrument, Redemption Price, Percentage										115.00%
The Investor Note [Member]
Long-term Debt, Gross	[5]															$ 33,922,000									33,922,000			$ 33,922,000	2,245,000
Conditional Settlement Agreement [Member]
Debt Instrument, Interest Rate, Stated Percentage											0.00%
Debt Instrument, Term (Month)											3 years
Long-term Debt, Total											$ 3,500,000
Repayments of Debt																									$ 500,000
Conditional Settlement Agreement [Member] | Forecast [Member]
Repayments of Debt													$ 1,500,000	$ 1,000,000
Conditional Settlement Agreement [Member] | Subsequent Event [Member]
Repayments of Debt		$ 350,000													$ 150,000
Alter Domus and Various Lenders [Member] | Financing Acquisition Term Loan [Member]
Debt Instrument, Face Amount					$ 105,000,000
Debt Instrument, Periodic Payment, Total					$ 262,500
Debt Instrument, Initial Prepayment Premium, Percentage					5.00%
Debt Instrument, Final Prepayment Premium, Percentage					1.00%
Debt Instrument, Interest Rate, Effective Percentage																13.50%									13.50%			13.50%
Alter Domus and Various Lenders [Member] | Financing Acquisition Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate					2.50%
First Insurance Funding [Member] | Financing Note [Member]
Debt Instrument, Face Amount																								$ 1,400,000					$ 100,000
Debt Instrument, Periodic Payment, Total																								$ 159,000
Debt Instrument, Interest Rate, Stated Percentage																								3.35%					3.35%
Debt Instrument, Term (Month)																								9 months
First Insurance Funding [Member] | Second Financing Note [Member]
Debt Instrument, Face Amount																													$ 400,000
Debt Instrument, Interest Rate, Stated Percentage																													4.35%
First Insurance Funding [Member] | Third Financing Note [Member]
Debt Instrument, Face Amount																			$ 1,700,000
Debt Instrument, Interest Rate, Stated Percentage																			3.00%
First Insurance Funding [Member] | Fourth Financing Note [Member]
Debt Instrument, Face Amount																$ 500,000			$ 54,000						$ 500,000			$ 500,000
Debt Instrument, Interest Rate, Stated Percentage																4.35%			4.35%						4.35%			4.35%
C6 Capital [Member] | Future Revenue Payable [Member]
Debt Instrument, Face Amount												$ 2,500,000
Debt Instrument, Periodic Payment, Total												$ 155,000
Debt Instrument, Interest Rate, Stated Percentage												0.00%
Proceeds from Issuance of Long-term Debt, Total												$ 1,900,000
Gain (Loss) on Extinguishment of Debt, Total																							$ (154,000)
Debt Instrument, Unamortized Discount, Total												$ 500,000
Debt Instrument, Effective Interest Rate for Discount Amortization																													158.00%
C6 Capital [Member] | Non-Recourse Payable Agreement [Member]
Long-term Debt, Total																$ 6,600,000									$ 6,600,000			$ 6,600,000
Long-term Debt, Gross																8,300,000									8,300,000			8,300,000
C6 Capital [Member] | Future Revenue Payable One [Member]
Debt Instrument, Face Amount						$ 1,200,000												1,200,000
Debt Instrument, Periodic Payment, Total																	$ 148,000
Proceeds from Issuance of Long-term Debt, Total																		$ 1,000,000.0
Debt Instrument, Effective Interest Rate for Discount Amortization																	129.00%
C6 Capital [Member] | Future Revenue Payable Two [Member]
Debt Instrument, Face Amount																	$ 9,500,000
Debt Instrument, Periodic Payment, Total																	384,000
Proceeds from Issuance of Long-term Debt, Total																	6,900,000
Debt Instrument, Unamortized Discount, Total																	$ 2,600,000
Debt Instrument, Effective Interest Rate for Discount Amortization																	89.00%
Amended C6 Capital Agreement [Member] | Future Revenue Payable [Member]
Debt Instrument, Effective Interest Rate for Discount Amortization																													117.00%
Amended C6 Capital Agreement [Member] | Non-Recourse Payable Agreement [Member]
Debt Instrument, Face Amount																													$ 3,500,000
Debt Instrument, Periodic Payment, Total																											$ 116,000		$ 54,000
Debt Instrument, Interest Rate, Stated Percentage																													0.00%
Streeterville Capital, LLC [Member] | The Investor Note [Member]
Debt Instrument, Face Amount							$ 10,700,000
Debt Instrument, Periodic Payment, Total							$ 1,000,000
Debt Instrument, Interest Rate, Stated Percentage							9.00%
Debt Instrument, Term (Month)							18 years
Gain (Loss) on Extinguishment of Debt, Total																												(1,300,000)
Debt Instrument, Unamortized Discount, Total							$ 1,000,000.0
Long-term Debt, Gross																$ 9,300,000									9,300,000			9,300,000
Streeterville Capital, LLC [Member] | The Investor Note [Member] | Shares Issued in Repayment of Debt [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)																284,090	454,545
Debt Conversion, Original Debt, Amount																$ 625,000	$ 1,000,000.0
Streeterville Capital, LLC [Member] | The Fourth Investor Note [Member]
Debt Instrument, Face Amount			$ 16,100,000
Debt Instrument, Periodic Payment, Total			$ 1,500,000
Debt Instrument, Interest Rate, Effective Percentage			16.30%
Debt Instrument, Interest Rate, Stated Percentage			9.00%
Debt Instrument, Term (Month)			18 years
Debt Instrument, Unamortized Discount, Total			$ 1,100,000
Long-term Debt, Gross																$ 15,100,000									$ 15,100,000			$ 15,100,000

[1] Note payable with an original balance for $1.4 million to First Insurance Funding was executed in July 2020 by the Company for the purposes of financing a portion of the Company's insurance coverage. The Note had an annual percentage rate of 3.35% with nine monthly payments of approximately $159 thousand and was paid off in the three months ended June 30 ,2021. The Company financed two additional insurance policies in the fourth quarter of 2020 for $0.1 million and $0.4 million, respectively. The smaller of which matured in April 2021 and the other of which matured in September 2021, and for which had annual interest rates of 3.35% and 4.35%, respectively. The Company executed two additional notes payable in the third quarter of 2021 for $1.7 million and $54 thousand, respectively at interest rates of 3.00% and 4.35%, respectively. In the fourth quarter, the Company executed one additional notes payable for $0.5 million at an interest rate of 4.35%.

[2] On April 30, 2020 and May 2, 2020, the Company entered into unsecured loans in the aggregate principal amount of approximately $1.9 million (the “Loans”) pursuant to the Paycheck Protection Program (the “PPP”), sponsored by the Small Business Administration as guarantor of loans under the PPP ($0.8 million of the loans related to a since discontinued operation and is classified in liabilities held for sale at December 31, 2020). The Loans, and interest accrued thereon, were forgivable, partially or in full, if certain conditions were met. The Loans were evidenced by four promissory notes, three with Bank of America, NA which were dated as of April 30, 2020 and one with Dogwood State Bank dated May 2, 2020. The Bank of America notes were to mature two years from funding date of the notes and the Dogwood State Bank note was to mature two years from the note date. Each of the notes bore interest at a fixed rate of 1.0% per annum with payments deferred. Prepayments on the Loans were permitted at any time prior to maturity with no prepayment penalties. All $1.9 million of the loans outstanding at December 31, 2020 were forgiven in the three months ending June 30, 2021. The remaining $1.4 million of Pay-check Protection loans were acquired as part of the GTS acquisition, and which were forgiven in the third quarter of 2021. The Company had a contingent receivable associated with the remaining PPP loan whereby the Company would be paid by the Sellers of GTS if the remaining PPP loan was not forgiven. Upon forgiveness of the loan, the receivable was relieved resulting in no gain or loss on the transaction.

[3] Includes vehicle and equipment loans with interest rates ranging from 5.74% to 8.99%.

[4] On September 1st and 2nd, 2020, the Company entered into non-recourse agreements for the sale of future receipts to C6 Capital. The Company received net cash proceeds of $1.9 million for the future receipts of revenues in the amount of approximately $2.5 million. The Company recorded a liability of approximately $2.5 million and a debt discount of approximately $0.5 million, which represents the original issue discount and the fees paid in association with the financing. The debt discount was amortized to interest expense over the life of the agreement. Under the terms of the agreement, the Company was required to make minimum weekly payments in the aggregate of $155 thousand, which included a portion related to the discount amortization that was recorded as interest expense. The note had no stated interest rate and the effective interest rate used to amortize the discount was approximately 158%. These notes were refinanced in November 2020 and a loss on extinguishment of debt was recorded for $154 thousand related to the unamortized discount at the time of payoff. To refinance the original future revenues payable note and to provide the Company with additional capital, the Company took out two additional non-recourse agreements with C6 Capital for the sale of future revenues in the total amount of $3.5 million. These agreements had no stated interest rate and the original issue discount including upfront fees are being amortized using an effective interest rate of approximately 117%. After combined weekly payments of approximately $54 thousand for the first four weeks, the combined payments increased to approximately $116 thousand until June 2021 when the notes were paid off. In October 2021, the Company entered into a 60-day non-recourse agreement for the sale of future receipts to C6 Capital. The Company received net cash proceeds of $1.0 million with a face amount of $1.2 million. This agreement was paid off in December 2021. The agreement had no stated interest rate, but the discount and loan origination fees were amortized based on a 129% interest rate. A second non-recourse agreement with C6 was originated in November 2021 with a face amount of $9.5 million. The Company received net cash proceeds of $6.9 million. The Company recorded a liability of $9.5 million and a debt discount of $2.6 million. Under the terms of the agreement, for the first 12 weeks, the Company makes weekly payments of $148 thousand and for the final 20 weeks, the Company makes payments of $384 thousand. The agreement had no stated interest rate, but the discount and loan origination fees are being amortized based on an 89% interest rate. As of December 31, 2021, the future payments for this financing agreement was approximately $8.3 million ($6.6 million net of discount). See table on following page.

[5] On November 13, 2020, the Company completed a Securities Purchase Agreement with an institutional investor, pursuant to which the Company agreed to issue to the Investor an unsecured convertible instrument in the principal amount of $2.2 million (the “Convertible Security” or “Note”) to purchase shares of the Company’s common stock, $0.001 par value per share (the “Common Stock”) against the payment of the applicable consideration therefore. Upon the closing on November 13, 2020, the Company received gross proceeds of $2.2 million before fees and other expenses associated with the transaction, including but not limited to, a $0.2 million original issue discount payable to the Investor. The net proceeds received by the Company were used primarily for working capital, debt repayment and general corporate purposes. The Note is payable in full within eighteen (18) months after the purchase price date in accordance with the terms set forth in the Note and accrues interest on the outstanding balance at the rate of ten percent (10%) per annum from the Purchase Price Date until the Note is paid in full. All interest shall compound daily and shall be payable in accordance with the terms of the Note. Company has the right to prepay all or any portion of the outstanding balance in an amount equal to 115% multiplied by the portion of the outstanding balance to be prepaid. The creditor may request payment of up to $250 thousand per month beginning 6 months after initial issuance. Original issue discount is amortized over the expected life of the investment at an effective interest rate of approximately 29%. The Company elected the fair value option for this note and as a result did not bifurcate any potential embedded derivatives. The Company determined that the fair value at December 31, 2020 approximated its carrying value so no fair value adjustment was made as of December 31, 2020. In February 2021, the Company negotiated modified terms which effectively removed the convertible option from the note and the Company recorded a $250 thousand loss on extinguishment. In July 2021, the Company issued 248,509 shares of common stock in exchange for a payment against the debt of $1 million and in September 2021, the Company signed an exchange agreement to issue 83,333 shares of common stock in exchange for a payment against the debt of $250 thousand. In October 2021, the Company issued 100,000 shares in exchange for a payment against the debt of $250,000. In November 2021, the Company issued 113,636 shares in exchange for a payment against the debt of $250,000. The carrying value was $0.7 million at December 31, 2021. On March 23, 2021, the Company completed a second note payable with the same institutional investor with a face amount of $10.7 million, a stated interest rate of 9.0%, an estimated effective interest rate of 19.6%, an original issue discount of $1.0 million. The note payable is payable within eighteen (18) months after the purchase date and the creditor may request payment of up to $1 million per month beginning 6 months after initial issuance. In September 2021, the Company issued 333,333 shares of common stock in exchange for a payment against the debt of $1 million. In October 2021, the Company issued 400,000 shares of common stock in exchange for $1.0 million payment against the debt. In November 2021, the Company issued 454,545 shares of common stock in exchange for a $1.0 million payment against the debt. In December 2021, the Company issued 454,545 shares of common stock in exchange for $1.0 million payment against the debt. The carrying value was $7.2 million at December 31, 2021. On May 11, 2021, the Company completed a third note payable agreement with the institutional investor with a face amount of $10.7 million, a stated interest of 9% per annum and a combined original issue discount and unamortized prepaid fees of $1.0 million. The net proceeds were to be used for working capital, future acquisitions and general corporate purposes. The note payable is payable within eighteen (18) months after the purchase date and the creditor may request payment of up to $1 million per month beginning 6 months after initial issuance. In November 2021, the Company issued 454,545 shares of common stock in exchange for $1.0 million payment against the debt. In December 2021, the Company issued 284,090 shares of common stock in exchange for $625 thousand payment against the debt. The carrying value was $9.3 million at December 31, 2021. On December 20, 2021, the Company completed a fourth note payable agreement with the institutional investor with a face amount of $16.1 million, a stated interest rate of 9.0%, an estimated effective interest rate of 16.3%, and an original issue discount of $1.1 million. The note payable is payable within eighteen (18) months after the purchase date and the creditor may request payment of up to $1.5 million per month beginning 6 months after initial issuance. The carrying value was $15.1 million at December 31, 2021. The Company has not made any payments on this note as of December 31, 2021. For Streeterville payments made by exchanging stock for payments against the debt in 2021, the Company recorded a total loss of $1.3 million on the exchanges due to the Company issuing shares at a lower price than the current market price on the dates of exchange.