Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 224,073	$ 159,227
Accounts receivable, net of allowance for doubtful accounts of $1,750 and $25, respectively	16,375	6,825
Inventory	7,918	4,568
Prepaid expenses and other current assets	4,527	347
Total current assets	252,893	170,967
Operating lease, right-of-use assets	5,182	6,287
Property and equipment, net	1,603	850
Other long-term assets	1,228	723
Total assets	260,906	178,827
Current liabilities:
Accounts payable	1,371	1,004
Accrued expenses	6,961	5,038
Deferred revenue	5,160	3,104
Operating lease liabilities	1,344	1,187
Current portion of long-term debt		500
Total current liabilities	14,836	10,833
Long-term debt, net of discount and current portion	15,000	14,332
Operating lease liabilities, net of current portion	4,508	5,839
Deferred revenue, net of current portion	11,958	8,588
Other long-term liabilities		194
Total liabilities	46,302	39,786
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized, no shares issued or outstanding at December 31, 2021 and December 31, 2020, respectively
Common stock, $0.001 par value; 100,000,000 shares authorized; 31,077,004 shares and 27,273,095 shares issued and outstanding at December 31, 2021 and December 31, 2020, respectively	31	27
Additional paid-in capital	315,210	217,482
Accumulated deficit	(100,637)	(78,468)
Total stockholders' equity	214,604	139,041
Total liabilities and stockholders' equity	$ 260,906	$ 178,827