CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 130,996	$ 106,045
Accounts receivable, net of reserve of $122 and $308, respectively	39,412	30,913
Inventories, net of obsolescence reserve of $865 and $851, respectively	1,784	3,311
Prepaid expenses	5,451	3,059
Other current assets	760	786
Total current assets	178,403	144,114
Property and equipment, including capitalized software development costs, net of accumulated depreciation and amortization of $38,867 and $36,891, respectively	24,725	22,397
Operating lease right-of-use assets	1,168	1,464
Goodwill	14,916	14,916
Other assets	882	926
Total assets	220,094	183,817
Current liabilities
Accounts payable and other accrued liabilities	21,036	20,899
Accrued compensation and benefits	7,811	8,474
Contract liabilities	5,925	5,654
Short-term portion	1,399	1,339
Operating lease obligations – short-term	656	677
Other current liabilities	1,831	1,903
Total current liabilities	38,658	38,946
Total, net of short-term portion	13,591	14,301
Operating lease liabilities – long-term	642	941
Deferred income taxes	670	652
Other liabilities	1,833	1,873
Total liabilities	55,394	56,713
Commitments and contingencies (Note 8)
Stockholders’ equity
Common stock, $0.001 par value, 250,000,000 shares authorized, 66,755,230 shares and 64,625,071 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	105	103
Additional paid-in capital	341,928	270,800
Accumulated other comprehensive income	17	44
Accumulated deficit	(177,350)	(143,843)
Total stockholders’ equity	164,700	127,104
Total liabilities and stockholders’ equity	$ 220,094	$ 183,817