CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows used in operating activities:
Net income (loss)	$ (5,489,000)	$ (392,000)	$ 1,620,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	2,732,000	2,272,000	1,971,000
Provision for (recovery from) credit losses			2,562,000
Gain on forgiveness of Paycheck Protection Program note			(2,946,000)
Gain on investment	(132,000)	(30,000)	(611,000)
Accretion of interest on contractual payment obligation			43,000
Loss on disposal of fixed assets		68,000
Amortization of debt issuance costs	43,000		108,000
Stock-based compensation	3,971,000	3,161,000	2,606,000
Impairment of right-of-use operating lease asset			281,000
Changes in operating assets and liabilities:
Accounts receivable	2,890,000	(5,051,000)	(3,572,000)
Inventories	219,000	(9,330,000)	389,000
Prepaid expenses and other assets	(361,000)	(1,210,000)	(12,000)
Accounts payable	(2,530,000)	4,073,000	(441,000)
Contractual payment obligation liability			(1,083,000)
Deferred revenue	613,000	222,000	67,000
Accrued expenses and other liabilities	(799,000)	(1,590,000)	246,000
Net cash provided by (used in) operating activities	1,157,000	(7,807,000)	1,228,000
Cash flows from investing activities:
Capital expenditures	(4,284,000)	(3,902,000)	(2,087,000)
Proceeds from investment	132,000	30,000	611,000
Net cash used in investing activities	(4,152,000)	(3,872,000)	(1,476,000)
Cash flows from financing activities:
Borrowings under revolving loan facility, net of issuance costs	23,906,000		3,964,000
Repayments under revolving loan facility	(14,000,000)		(18,548,000)
Repayments of April 21 Funds promissory notes			(2,800,000)
Proceeds from the sale of common stock, net of issuance costs			37,627,000
Taxes paid related to net share settlement of restricted stock units	(796,000)	(1,039,000)	(1,201,000)
Proceeds from exercise of warrants	963,000
Proceeds from exercise of stock options			299,000
Net cash provided by (used in) financing activities	10,073,000	(1,039,000)	19,341,000
Effect of exchange rates on cash, cash equivalents, and restricted cash	169,000	48,000	(695,000)
Net increase (decrease) in cash, cash equivalents, and restricted cash	7,247,000	(12,670,000)	18,398,000
Cash, cash equivalents, and restricted cash, Beginning of period	17,137,000	29,807,000	11,409,000
Cash, cash equivalents, and restricted cash, End of period	24,384,000	17,137,000	29,807,000
Supplemental Disclosures of Cash Flow Information:
Interest paid	451,000	6,000	340,000
Taxes paid, net	123,000	88,000	74,000
Non-cash investing and financing activities:
Dividends earned on Series B preferred stock	1,266,000	1,206,000	1,148,000
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 2,368,000	$ 3,646,000	183,000
Reclassification of debt issuance costs to prepaid expenses and other current assets			$ 114,000