CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 598	$ (7,364)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	2,535	2,726
(Gain) loss on sale or disposal of Property, equipment and leasehold improvements	(87)	8
Deferred income taxes	831	(2,341)
Stock-based compensation	447	418
Lease expense	111	54
Other	(862)	66
Changes in operating assets and liabilities:
Accounts receivable, net	(3,957)	2,466
Inventories	(3,183)	(2,531)
Other current assets	(1,384)	(2,406)
Accounts payable and other accrued expenses	368	12,493
Deferred revenue	(815)	(812)
Accrued salaries, wages and payroll taxes	(1,891)	745
Refundable deposits	71	(70)
Net cash provided by (used in) operating activities	(7,218)	3,452
Cash flows from investing activities:
Expenditures for Property, equipment and leasehold improvements	(7,066)	(5,173)
Proceeds from sale of Property, equipment and leasehold improvements	97	16
Net cash used in investing activities	(6,969)	(5,157)
Cash flows from financing activities:
Principal payments on debt and finance lease obligations	(348)	(277)
Net borrowings under revolving line of credit	14,339	2,609
Proceeds from issuances of common stock	92	0
Tax payments related to stock-based awards	(270)	(157)
Net cash provided by financing activities	13,813	2,175
Increase (decrease) in Cash and cash equivalents	(374)	470
Cash and cash equivalents
Beginning of period	469	1,200
End of period	95	1,670
Supplemental disclosure of cash flow information:
Cash paid for interest	273	335
Cash received for income taxes, net	61	0
Cash paid for amounts included in measurement of lease liabilities	752	742
Supplemental disclosure of non-cash information:
Right-of-use assets obtained in exchange for operating lease obligations	0	19,726
Right-of-use assets obtained in exchange for finance lease obligations	0	2,538
Purchases of Property, equipment and leasehold improvements included in Accounts payable at end of period	$ 573	$ 1,384