LONG-TERM DEBT AND CREDIT AGREEMENT Debt Disclosurre (Details) - USD ($)							3 Months Ended		12 Months Ended
	May 13, 2019	Apr. 08, 2019	Jan. 22, 2019	May 10, 2018	Dec. 15, 2017	Feb. 26, 2016	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	May 09, 2019	Feb. 08, 2018	Nov. 09, 2017	Jun. 15, 2015
Debt Instrument, Periodic Payment, Principal							$ 30,881,000
Term Loan, net of unamortized debt issuance costs							200,031,000		$ 200,105,000
Notes, net of unamortized original issue discount and debt issuance costs							28,555,000		28,187,000
Line of Credit Facility, Fair Value of Amount Outstanding							22,000,000		0
Other Long-term Debt							1,240,000		1,296,000
Total debt							251,826,000		229,588,000
Short-term debt							31,400,000		30,554,000
Long-term Debt							220,426,000		$ 199,034,000
Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction		$ 1,600,000
Debt Related Commitment Fees and Debt Issuance Costs		$ 4,400,000
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt								$ (23,000)
Interest Expense							5,283,000	$ 5,185,000
Convertible Debt Retired			3,900		2,000				16,247	73,986
Convertible Debt Issued			106,753								123,000		125,000
Extinguishment of Debt, Amount	$ 74,000,000.0		$ 3,900,000		$ 2,000,000.0				$ 16,200,000
Debt Instrument, Discounted Repurchase Amount	982.50
Debt Instrument, Face Amount													$ 1,000
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments	600,000
Loss (Gain) on Extinguishment of Debt	$ 2,900,000
Convertible Note Options Outstanding	28,867
Repayments of Debt	$ 72,700,000		$ 3,600,000		$ 1,700,000				14,700,000
Convertible Notes unamortized issue discount and debt issuance costs							3,402,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							4,925,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							6,529,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							212,217,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							177,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							499,000
Total debt							255,228,000
Revolving Credit Facility [Member]
Debt Instrument, Periodic Payment, Principal							0
Short-term debt							0
Long-term Debt							22,000,000
Convertible Notes unamortized issue discount and debt issuance costs							0
Long-term Debt, Maturities, Repayments of Principal in Year Two							0
Long-term Debt, Maturities, Repayments of Principal in Year Three							0
Long-term Debt, Maturities, Repayments of Principal in Year Four							22,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							0
Long-term Debt, Maturities, Repayments of Principal after Year Five							0
Total debt							22,000,000
Other Debt Obligations [Member]
Debt Instrument, Periodic Payment, Principal							102,000
Short-term debt							136,000
Long-term Debt							1,105,000
Convertible Notes unamortized issue discount and debt issuance costs							0
Long-term Debt, Maturities, Repayments of Principal in Year Two							144,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							154,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							165,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							177,000
Long-term Debt, Maturities, Repayments of Principal after Year Five							499,000
Total debt							1,241,000
Cerberus Business Finance LLC [Member]
Debt Instrument, Periodic Payment, Principal							1,913,000
Short-term debt							2,709,000
Long-term Debt							197,321,000
Convertible Notes unamortized issue discount and debt issuance costs							3,090,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							4,781,000
Long-term Debt, Maturities, Repayments of Principal in Year Three							6,375,000
Long-term Debt, Maturities, Repayments of Principal in Year Four							190,052,000
Long-term Debt, Maturities, Repayments of Principal in Year Five							0
Long-term Debt, Maturities, Repayments of Principal after Year Five							0
Total debt							203,120,000
Convertible Debt [Member]
Debt Instrument, Periodic Payment, Principal							28,867,000
Short-term debt							28,555,000
Long-term Debt							0
Long-term Debt, Gross													$ 125,000,000.0
Debt Instrument, Interest Rate, Stated Percentage													2.00%
Interest Expense							500,000
Convertible Notes unamortized issue discount and debt issuance costs							312,000		1,000
Long-term Debt, Maturities, Repayments of Principal in Year Two							0
Long-term Debt, Maturities, Repayments of Principal in Year Three							0
Long-term Debt, Maturities, Repayments of Principal in Year Four							0
Long-term Debt, Maturities, Repayments of Principal in Year Five							0
Long-term Debt, Maturities, Repayments of Principal after Year Five							0
Total debt							28,867,000
Cerberus Business Finance LLC [Member]
Debt Instrument, Covenant Description		On April 8, 2019, we entered into an amendment to the Financing Agreement. The amendment provided for an additional delayed draw term loan commitment in the aggregate principal amount of $100.0 million (the “Delayed Draw Funds”) for the purpose of funding the purchase of a portion of Notes in the Offer described above. On May 2, 2019, we received the Delayed Draw Funds under the Financing Agreement. We used $72.7 million of the Delayed Draw Funds for the purchase of a portion of our Notes, $0.6 million for the Notes interest payment, and $6.0 million for the payment of refinancing fees. On June 18, 2019, we repaid $20.7 million of the Delayed Draw Funds. The $79.3 million Delayed Draw Funds borrowed and that remain outstanding will mature on May 10, 2023 under the terms of the Financing Agreement. The amendment also modified the covenant that requires us to maintain a leverage ratio (defined to mean the ratio of (a) the sum of indebtedness under the Term Loan and Credit Facility and non-cash collateralized letters of credit to (b) consolidated EBITDA under the Term Loan and Credit Facility) based on the level of availability of our Credit Facility plus unrestricted cash on-hand.		On May 10, 2018, we entered into an amendment to the Financing Agreement, which extended the maturity of the Financing Agreement to May 2023, and increased the Term Loan by $22.7 million and the amount available under the Credit Facility by $12.5 million, for an aggregate amount available of $22.5 million.		We granted a security interest on substantially all of our assets to secure the obligations under the Term Loan and the Credit Facility. The Term Loan requires us to use 50% of excess cash flow, as defined in the Financing Agreement, to repay outstanding principal of the loans under the Financing Agreement. The Financing Agreement contains customary representations and warranties, covenants, mandatory prepayments, and events of default under which our payment obligations may be accelerated.
additional long term debt												$ 15,000,000.0
Cerberus Business Finance LLC [Member] | Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000.0
Cerberus Business Finance LLC [Member] | Long-term Debt [Member]
Unamortized Debt Issuance Expense							3,090,000		$ 3,334,000
Long-term Debt						100,000,000.0
Interest Expense, Long-term Debt							4,200,000
Cerberus Business Finance LLC [Member] | Long-term Debt [Member] | Revolving Credit Facility [Member]
Interest Expense, Long-term Debt							$ 100,000
Cerberus Business Finance LLC [Member] | Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 5,000,000.0