Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 77,322	$ 61,926
Restricted cash, current portion	55	55
Short-term investments	493,852	379,065
Accounts receivable, net of allowance of $3,080 in 2020 and $2,919 in 2019	58,706	53,351
Inventory	18,033	12,394
Prepaid expenses and other current assets, net	15,536	16,376
Total current assets	663,504	523,167
Property and equipment, net	25,925	23,283
Operating lease right-of-use assets	21,475	23,730
Other assets	12,357	12,476
Total assets	723,261	582,656
Current liabilities:
Accounts payable	3,450	8,604
Accrued compensation	16,583	16,088
Other accrued liabilities	53,082	49,043
Deferred revenue, current portion	52,392	56,016
Short-term debt financing	50,053	50,123
Total current liabilities	175,560	179,874
Long-term debt financing	197,476	73,656
Deferred revenue, long-term portion	22,533	23,808
Operating lease liabilities, long-term portion	23,115	26,297
Other long-term liabilities	310	310
Total liabilities	418,994	303,945
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock, $0.0001 par value: 750,000 shares authorized at both June 30, 2020 and December 31, 2019, respectively; 79,717 and 78,005 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	8	8
Additional paid in capital	1,093,072	976,955
Accumulated deficit	(794,583)	(699,171)
Accumulated other comprehensive income	5,770	919
Total stockholders' equity	304,267	278,711
Total liabilities and stockholders' equity	$ 723,261	$ 582,656