Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents, including restricted cash of $152 for both periods presented	$ 27,565	$ 27,325
Trade receivables, net of allowances of $87 and $68, respectively; Including receivables from Related Party of $2.7 million and $2.8 million, respectively	6,604	5,234
Inventories	12,495	14,525
Prepaid expenses and other assets	2,312	2,450
Total current assets	48,976	49,534
Leasehold improvements and equipment, net	2,000	2,137
Intangible assets, net	472	510
Right-of-use assets, net	2,226	2,400
Other long-term assets	405	383
Total assets	54,079	54,964
Current liabilities
Accounts payable	7,899	10,232
Accrued expenses	10,465	9,493
Current maturities of operating lease obligations	850	691
Current maturities of finance lease obligations	11	11
Customer deposits	227	195
Total current liabilities	19,452	20,622
Deferred revenue	3,311	3,311
Operating lease obligations, less current maturities	2,356	2,563
Finance lease obligations, less current maturities	9	12
Total liabilities	25,128	26,508
Commitments and Contingencies (Note 10)
Stockholders' Equity
Common stock, $0.001 par value; authorized 150,000 shares; 75,153 shares and 74,981 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively	75	75
Additional paid-in capital	219,829	218,845
Accumulated deficit	(190,952)	(190,460)
Cumulative translation adjustments	(1)	(4)
Total stockholders' equity	28,951	28,456
Total liabilities and stockholders' equity	$ 54,079	$ 54,964