Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 20,462	$ 20,023
Short-term investments	120,089	58,320
Accounts receivable, net	23,867	19,790
Inventory	4,037	2,062
Prepaid expenses and other current assets	4,337	4,100
Total current assets	172,792	104,295
Long-term investments	8,030	0
Property and equipment, net	26,464	9,158
Operating lease right-of-use assets	90,124	0
Goodwill	862	862
Other assets	7,940	3,208
Total assets	306,212	117,523
Current liabilities:
Accounts payable	8,243	2,284
Accrued liabilities	32,586	26,688
Deferred revenue	1,251	1,223
Debt, current portion	1,944	0
Accrued interest	128	139
Operating lease liabilities, current portion	7,914	0
Total current liabilities	52,066	30,334
Debt, noncurrent portion	32,989	34,899
Deferred rent, noncurrent portion	0	153
Operating lease liabilities, noncurrent portion	85,748	0
Total liabilities	170,803	65,386
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.001 par value – 5,000,000 shares authorized at December 31, 2019 and 2018; and none issued and outstanding at December 31, 2019 and 2018, respectively	0	0
Common stock, $0.001 par value – 100,000,000 shares authorized at December 31, 2019 and 2018; 26,682,720 and 24,368,073 shares issued and outstanding at December 31, 2019 and 2018, respectively	25	23
Additional paid-in capital	395,695	257,955
Accumulated other comprehensive income (loss)	82	(16)
Accumulated deficit	(260,393)	(205,825)
Total stockholders’ equity	135,409	52,137
Total liabilities and stockholders’ equity	$ 306,212	$ 117,523
Common stock, shares issued	26,682,720	24,368,073