Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 134,179	$ 143,940
Short-term investments	130,552	165,250
Accounts receivable, net	42,941	38,354
Inventory	20,225	21,054
Prepaid expenses and other current assets	10,540	7,744
Total current assets	338,437	376,342
Property, plant and equipment, net	57,223	58,147
Operating lease right-of-use assets	15,465	16,523
Other assets	1,152	1,596
Total assets	412,277	452,608
Current liabilities
Accounts payable	9,208	12,770
Accrued expenses and other current liabilities	64,323	65,376
Operating lease liabilities	5,614	5,502
Total current liabilities	79,145	83,648
Carrying value	193,833	188,651
Long-term operating lease liabilities	10,829	12,102
Other non-current liabilities	1,261	1,257
Total liabilities	285,068	285,658
Commitments and contingencies (Note 12)
Stockholders’ equity
Preferred stock, $0.001 par value; 15,000,000 shares authorized as of March 31, 2020 and December 31, 2019; none issued and outstanding	0	0
Common stock, $0.001 par value; 150,000,000 shares authorized as of March 31, 2020 and December 31, 2019; 46,476,185 and 46,464,669 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively	46	46
Additional paid-in capital	1,072,412	1,062,996
Accumulated other comprehensive loss	(120)	(92)
Accumulated deficit	(945,129)	(896,000)
Total stockholders’ equity	127,209	166,950
Total liabilities and stockholders’ equity	$ 412,277	$ 452,608