Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net loss	$ (1,898)	$ (5,419)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	397	228
Amortization of right-of-use financing leases	324	238
Amortization of right-of-use operating leases	690	663
Amortization of imputed interest		(455)
Change in receivable reserves	97	(140)
Stock-based compensation	1,471	1,002
Other	(14)
Changes in current operating assets and liabilities:
Accounts receivable	585	(7,441)
Inventories	511	(3,931)
Prepaid expenses and other assets	(4,982)	(1,799)
Income taxes	(7)	28
Accounts payable and accrued liabilities	5,361	3,670
Deferred revenue	(5,727)	8,237
Operating lease liabilities	(703)	(653)
Net cash used in operating activities	(3,895)	(5,772)
Investing activities
Purchases of property and equipment	(2,496)	(1,512)
Collection of notes receivable		6,234
Net cash (used in)/ provided by investing activities	(2,496)	4,722
Financing activities
Net proceeds from the exercise of options for common stock	50	17
Net proceeds from issuance of common stock	177
Payment to affiliates		(129)
Payment of deferred financing costs	(195)
Principal repayments of financing leases	(355)	(241)
Net cash used in financing activities	(323)	(353)
Decrease in cash	(6,714)	(1,403)
Cash, beginning of period	10,296	11,699
Cash, end of period	3,582	10,296
Supplemental cash flow information:
Interest paid	7	4
Income taxes paid, net of refunds	2	(20)
Non-cash investing and financing activities:
Acquisition of right-of-use assets and lease liabilities		841
Surrender and retirement of common stock	$ 720