Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities:
Net loss	$ (2,748)	$ (1,394)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	237	238
Amortization	80
Non cash amortization of right-of-use asset and liability	(68)	(7)
Provision for excess and obsolete inventories	247	80
Share based compensation expense	399	247
Gain on disposal of property and equipment	0	2
Changes in assets and liabilities:
Accounts receivable	47	6,100
Unbilled revenue	1,881	(958)
Inventories	847	(236)
Prepaid expenses and other current assets	7	(313)
Accounts payable	(652)	1,281
Accrued expenses and other liabilities	197	403
Deferred revenue	59	18
Net cash provided by operating activities	533	5,541
Investing Activities:
Purchases of property and equipment	(1)	(78)
Disposals of property and equipment	0	42
Net cash used in investing activities	(1)	(36)
Financing Activities:
Change in bank line of credit	0	(2,050)
Payments on financing lease obligations	(157)	(195)
Proceeds from sale of common stock	0	168
Net cash used in financing activities	(157)	(2,077)
Net increase in cash, cash equivalents and restricted cash	375	3,428
Cash, cash equivalents and restricted cash at beginning of period	3,653	2,418
Cash, cash equivalents and restricted cash at end of period	$ 4,028	$ 5,846