Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows provided by operating activities
Net (loss)/income	$ (193)	$ 3,355
Adjustments to reconcile net loss to net cash (used in)/provided by operating activities
Depreciation and amortization	3,523	2,126
Share-based compensation	2,230	1,538
Bad debt expense	262	147
Loss on sale of property and equipment	0	576
Loss from discontinued operations, net of tax	0	1,436
Deferred taxes	(23)	(313)
Change in assets and liabilities
Accounts receivable	220	(2,131)
Contract assets	837	(1,589)
Inventory	(1,906)	(1,419)
Other current assets	(1,752)	(1,982)
Accounts payable and accrued and other current liabilities	(1,681)	(1,481)
Contract liabilities	(287)	(166)
Net cash provided by operating activities	1,230	97
Cash flows (used in)/provided by investing activities
Acquisition of property and equipment	(943)	(422)
Intangible property costs	(215)	(291)
Proceeds from sale of property and equipment	0	403
Proceeds from sale of discontinued operations	0	600
Net cash (used in)/provided by investing activities	(1,158)	290
Cash flows (used in)/provided by financing activities
Payments on finance lease obligations	(36)	(39)
Payments of debt obligations	(3,110)	0
Repurchase of common stock	(420)	(329)
Proceeds from ESPP	530	0
Proceeds from the exercise of options and warrants	2,076	1,397
Net cash (used in)/provided by financing activities	(960)	1,029
Effect of exchange rate changes on cash and cash equivalents	277	0
Net (decrease)/increase in cash and cash equivalents	(611)	1,416
Cash and cash equivalents—beginning of period	15,366	25,006
Cash and cash equivalents—end of period	14,755	26,422
Supplemental disclosure of cash flow information
Cash paid for interest	75	3
Cash received for income tax refund, net	$ 75	$ 2,000