Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 5,330	$ 4,937
Short-term investments	13,949	29,983
Accounts receivable and contract assets, net	2,830	3,859
Inventories, net	3,975	1,566
Prepaid expenses and other current assets	775	868
Total current assets	26,859	41,213
Property and equipment, net	758	976
Operating lease right-of-use asset, net	285	51
Intangible assets, net	2,569	1,982
Other assets	100	9
Total assets	30,571	44,231
Current liabilities:
Accounts payable	1,419	1,779
Accrued liabilities	1,463	824
Customer deposits	0	43
Deferred revenue- short term	166	155
Operating lease liability - short term	108	56
Total current liabilities	3,156	2,857
Long-term liabilities:
Deferred revenue- long term	167	110
Operating lease liability - long term	193	0
Total long-term liabilities	360	110
Total liabilities	3,516	2,967
Commitments and contingencies (Note 9 and 13)
Stockholders' equity:
Preferred stock - 5,000,000 authorized; par value $0.0001 per share; none issued and outstanding	0	0
Common stock - 150,000,000 authorized; par value $0.0001 per share; 41,175,993 and 40,851,945 shares issued and outstanding each period, respectively	4	4
Additional paid-in capital	94,333	91,025
Accumulated deficit	(67,376)	(49,759)
Accumulated other comprehensive loss	94	(6)
Total stockholders' equity	27,055	41,264
Total liabilities and stockholders' equity	$ 30,571	$ 44,231