Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 5,966,000	$ 7,261,000
Restricted cash	0	1,334,000
Accounts receivable, net of allowance for credit losses of $604 and $433 at June 30, 2025 and December 31, 2024, respectively	4,022,000	5,253,000
Inventories	3,236,000	2,246,000
Prepaid expenses and other current assets	550,000	501,000
Total current assets	13,774,000	16,595,000
Property and equipment, net	8,604,000	10,061,000
Operating lease right-of-use assets	1,092,000	1,264,000
Intangible assets, net	4,363,000	5,348,000
Goodwill	2,658,000	2,658,000
Other assets	231,000	231,000
Total assets	30,722,000	36,157,000
Current liabilities:
Accounts payable	2,945,000	2,433,000
Accrued expenses and other current liabilities	7,401,000	8,593,000
Deferred revenues	2,372,000	2,241,000
Current portion of operating lease liabilities	303,000	328,000
Current portion of contingent consideration	983,000	1,030,000
Total current liabilities	14,004,000	14,625,000
Long-term debt, net	15,270,000	15,192,000
Deferred revenues and other liabilities	264,000	353,000
Operating lease liabilities, net of current portion	780,000	919,000
Contingent consideration, net of current portion	96,000	96,000
Total liabilities	30,414,000	31,185,000
Commitments and contingencies (Note 13)
Stockholders’ equity:
Series C convertible preferred stock, $0.10 par value; 10,000,000 shares authorized, no shares issued and outstanding	0	0
Common stock, $0.001 par value; 150,000,000 shares authorized; 4,171,161 shares issued and outstanding at both June 30, 2025 and December 31, 2024	4,000	4,000
Additional paid-in capital	253,369,000	253,112,000
Accumulated deficit	(253,065,000)	(248,144,000)
Total stockholders’ equity	308,000	4,972,000
Total liabilities and stockholders’ equity	$ 30,722,000	$ 36,157,000