Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 159,317	$ 77,995
Accounts receivable	19,329	13,168
Supplies	6,806	3,402
Prepaid expenses and other current assets	2,235	2,387
Total current assets	187,687	96,952
Property and equipment, net	8,933	8,940
Right-of-use assets - operating lease	8,808	0
Finite-lived intangible assets, net	65,019	12,000
Goodwill	2,725	1,057
Restricted cash	603	603
Other assets	1,437	1,086
Total assets	275,212	120,638
Current liabilities:
Accounts payable	2,328	2,516
Accrued liabilities	13,734	9,186
Current portion of long-term debt	0	1,357
Current portion of operating lease liability	1,407	0
Total current liabilities	17,469	13,059
Long-term debt	694	23,925
Deferred rent, net of current portion	0	3,899
Acquisition related contingent consideration	6,088	0
Operating lease liability, net of current portion	11,506	0
Total liabilities	35,757	40,883
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000,000 shares authorized, no shares issued and outstanding as of December 31, 2019 and 2018	0	0
Common stock, $0.001 par value; 125,000,000 shares authorized, 49,625,341 and 40,863,202 shares issued and outstanding as of December 31, 2019 and 2018, respectively	50	41
Additional paid-in capital	486,090	313,800
Accumulated deficit	(246,685)	(234,086)
Total stockholders' equity	239,455	79,755
Total liabilities and stockholders' equity	$ 275,212	$ 120,638