Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows From Operating Activities
Net Income	$ 2,188	$ 1,985
Adjustments to Reconcile Net Income to Net Cash
Depreciation and Amortization	1,506	1,703
Compensation on Stock-Based & Equity Awards	201	151
Change in Accounts Receivable Allowance	18	158
Change in Inventory Reserves	(959)	398
Loss on Abandonment of Intangible Asset	560	0
Gain on Disposal of Property and Equipment	(176)	(3,821)
Changes in Current Operating Items
Accounts Receivable	1,686	2,430
Employee Retention Credit Receivable	(5,209)	0
Inventories	(5,755)	(567)
Contract Assets	(2,246)	325
Prepaid Expenses and Other Current Assets	(276)	858
Income Taxes	708	0
Accounts Payable	2,901	(2,808)
Accrued Payroll and Commissions	1,537	(621)
Other Accrued Liabilities	464	(290)
Net Cash Used In Operating Activities	(2,852)	(99)
Cash Flows from Investing Activities
Proceeds from Sale of Property and Equipment	626	6,019
Purchase of Intangible Asset	(49)	(25)
Purchases of Property and Equipment	(1,198)	(397)
Net Cash (Used In) Provided By Investing Activities	(621)	5,597
Cash Flows from Financing Activities
Net Change in Line of Credit	2,681	(7,542)
Proceeds from Long-term Debt	0	6,077
Principal Payments on Long-Term Debt	(873)	(2,567)
Principal Payments on Finance Leases	(492)	(432)
Stock Option Exercises	36	0
Net Cash Provided By (Used In) Financing Activities	1,352	(4,464)
Net Change in Cash	(2,121)	1,034
Cash - Beginning of Period	3,564	660
Cash - Ending of Period	1,443	1,694
Reconciliation of cash and restricted cash reported within the condensed consolidated balance sheets
Cash	444	328
Restricted Cash	999	1,366
Cash - Ending of Period	1,443	1,694
Supplemental Disclosure of Cash Flow Information:
Cash Paid During the Period for Interest	220	526
Cash Paid (Refunded) During the Period for Income Taxes	(114)	262
Supplemental Noncash Investing and Financing Activities:
Property and Equipment Purchases in Accounts Payable	0	6
Property Acquired under Operating Lease	858	4,685
Equipment Acquired under Finance Lease	$ 0	$ 395