Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 4,937	$ 16,647
Short-term investments	29,983	24,994
Accounts receivable, net	3,859	1,871
Inventories, net	1,566	2,655
Prepaid expenses and other current assets	868	760
Total current assets	41,213	46,927
Property and equipment, net	976	357
Operating lease right-of-use asset, net	51	139
Intangible assets, net	1,982	1,397
Other assets	9	13
Total assets	44,231	48,833
Current liabilities:
Accounts payable	1,779	1,232
Accrued liabilities	824	721
Customer deposits	43	2
Deferred revenue- short term	155	16
Operating lease liability- short term	56	94
Business acquisition liability - short term	0	275
Total current liabilities	2,857	2,340
Long-term liabilities:
Deferred revenue- long term	110	0
Operating lease liability - long term	0	56
Business acquisition liability - long term	0	23
Total long-term liabilities	110	79
Total liabilities	2,967	2,419
Commitments and contingencies (Note 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; 40,851,945 and 37,554,162 shares issued and outstanding each period, respectively	4	4
Additional paid-in capital	91,025	71,705
Accumulated deficit	(49,759)	(25,310)
Accumulated other comprehensive income (loss)	(6)	15
Total stockholders' equity	41,264	46,414
Total liabilities and stockholders' equity	$ 44,231	$ 48,833