Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 2,847	$ (1,487)
Adjustments to reconcile net cash (used in) provided by operating activities:
Depreciation and amortization expense	6,336	6,279
Paycheck Protection Program loan forgiveness	(9,151)	0
Deferred income taxes	(2)	(4)
Change in fair value of interest rate swap agreements	23	167
Stock-based compensation	1,541	1,295
Allowance for doubtful accounts	(426)	346
Common stock issued under defined contribution 401(k) plan	1,193	0
Gain on disposal of assets	(33)	0
Changes in operating assets and liabilities:
Accounts receivable	1,961	2,627
Employee retention credit receivable	(497)	0
Contract assets	1,117	(2,253)
Inventories	(6,653)	5,139
Prepaid expenses and other current assets	133	(865)
Accounts payable	(1,736)	(3,320)
Accrued liabilities	(2,676)	1,229
Customer deposits	(6,737)	(3,898)
Other non-current assets and liabilities	(66)	75
Net cash (used in) provided by operating activities	(12,826)	5,330
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(1,707)	(1,547)
Proceeds from disposals of property and equipment	33	0
Net cash used in investing activities	(1,674)	(1,547)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from line of credit	156,004	153,891
Payments on line of credit	(150,899)	(164,163)
Proceeds from long-term debt	817	9,530
Payments on long-term debt	(161)	(1,186)
Principal payments on finance leases	(1,672)	(992)
Shares withheld for taxes in connection with issuance of restricted stock	(1,423)	(139)
Proceeds from sale of common stock, net	9,314	232
Net cash provided by (used in) financing activities	11,980	(2,827)
NET (DECREASE) INCREASE IN CASH	(2,520)	956
CASH beginning of the period	3,372	2,416
CASH end of the period	852	3,372
Supplemental cash flow information:
Interest paid	741	1,449
Income taxes paid	102	81
Non-cash investing and financing activities:
Equipment additions via finance lease	2,757	3,196
Non-cash purchases of property and equipment	$ 18	$ 376