Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash, cash equivalents and restricted cash	$ 23,266	$ 24,606
Accounts receivable, net of allowance for doubtful accounts of $24 and $34, as of June 30, 2024 and December 31, 2023, respectively	928	1,625
Contract assets	2,254	3,609
Inventories, net	1,751	2,029
Prepaid expenses and other current assets	1,686	1,561
Total current assets	29,885	33,430
Property and equipment, net	12,043	8,948
Capitalized internal-use software, net	2,287	2,069
Right of use assets, net	896	981
Intangible assets, net	484	537
Non-marketable equity investment	300	300
Goodwill	185	185
Note receivable	1,229	1,200
Other assets	142	142
TOTAL ASSETS	47,451	47,792
Current liabilities:
Revolving line of credit	20,000	20,000
Trade payables	1,449	4,657
Accrued liabilities	1,277	2,673
Deferred revenue	756	1,052
Note payable, current	890	946
Lease liabilities, current	266	302
Total current liabilities	24,638	29,630
Long-term liabilities:
Lease liabilities, non-current	609	681
Notes payable, non-current	274	461
Other liabilities, non-current	125	125
Total liabilities	25,646	30,897
Commitments and contingencies (see Note 13)
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value; 200,000 authorized; 14,458 and 14,118 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively	14	14
Additional paid-in capital	328,788	322,436
Accumulated deficit	(306,997)	(305,555)
Total stockholders' equity	21,805	16,895
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 47,451	$ 47,792