Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands		Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents		$ 152,239	$ 143,228
Short-term marketable securities		367,853	379,574
Accounts receivable, net		48,015	47,986
Inventory		25,148	15,181
Prepaid expenses and other current assets		14,137	11,389
Total current assets		607,392	597,358
Long-term marketable securities		238,206	268,783
Property and equipment, net		46,685	43,668
Right-of-use assets		30,132	29,140
Intangible assets, net		17,681	8,524
Goodwill		3,290	3,290
Capitalized license fees		60	6,890
Other assets		4,721	4,882
Total assets	[1]	948,167	962,535
Current liabilities:
Accounts payable		24,378	16,197
Accrued compensation		22,935	18,557
Accrued expenses		23,073	25,703
Deferred revenue		11,936	12,277
Total current liabilities		82,322	72,734
Long-term operating lease liabilities		33,773	33,256
Obligation related to royalty		0	6,880
Other long-term liabilities		1,459	1,672
Total liabilities	[1]	117,554	114,542
Redeemable noncontrolling interest		45,500	49,600
Stockholders’ equity:
Common stock, par value of $0.00001 per share; 350,000,000 shares authorized as of March 31, 2020 and December 31, 2019; 94,509,011 and 94,261,414 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively		1	1
Additional paid-in capital		1,157,945	1,150,090
Accumulated other comprehensive income		7,705	1,111
Accumulated deficit		(380,538)	(352,809)
Total Stockholders’ Equity		785,113	798,393
Total Liabilities, Redeemable Noncontrolling Interest and Stockholders’ Equity		$ 948,167	$ 962,535

[1] As of March 31, 2020 and December 31, 2019, includes $42.0 million and $45.1 million of assets, respectively, that can be used only to settle obligations of the consolidated variable interest entity (“VIE”) and VIE’s subsidiaries, and $4.6 million and $5.7 million of liabilities of the consolidated VIE and VIE’s subsidiaries, respectively, for which their creditors do not have recourse to the general credit of the Company. See Note 3, Investment in Joint Venture.