Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 74,144	$ 61,926
Restricted cash, current portion	55	55
Short-term investments	331,681	379,065
Accounts receivable, net of allowance of $3,020 in 2020 and $2,919 in 2019	61,577	53,351
Inventory	14,161	12,394
Prepaid expenses and other current assets, net	15,590	16,376
Total current assets	497,208	523,167
Property and equipment, net	26,718	23,283
Operating lease right-of-use assets	22,620	23,730
Other assets	12,093	12,476
Total assets	558,639	582,656
Current liabilities:
Accounts payable	8,369	8,604
Accrued compensation	15,953	16,088
Other accrued liabilities	50,393	49,043
Deferred revenue, current portion	51,840	56,016
Short-term debt financing	50,087	50,123
Total current liabilities	176,642	179,874
Long-term debt financing	72,881	73,656
Deferred revenue, long-term portion	25,152	23,808
Operating lease liabilities, long-term portion	24,727	26,297
Other long-term liabilities	310	310
Total liabilities	299,712	303,945
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, $0.0001 par value: 750,000 shares authorized at both March 31, 2020 and December 31, 2019, respectively; 78,652 and 78,005 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	8	8
Additional paid in capital	988,199	976,955
Accumulated deficit	(734,946)	(699,171)
Accumulated other comprehensive income	5,666	919
Total stockholders' equity	258,927	278,711
Total liabilities and stockholders' equity	$ 558,639	$ 582,656