CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	[1]
Current assets:
Cash and cash equivalents	$ 10,798	$ 11,134
Restricted cash	972	971
Accounts receivable, net	6,000	8,939
Prepaid expenses and other current assets	2,681	3,522
Total current assets	20,451	24,566
Property and equipment, net	6,506	8,524
Right-of-use assets, operating leases	10,838	7,705
Intangible assets, net	0	95
Other non-current assets	928	1,403
Total assets	38,723	42,293
Current liabilities:
Accounts payable	1,154	1,679
Accrued expenses and other current liabilities	6,935	9,010
Note payable, current	1,292	0
Operating lease liabilities	6,813	3,786
Total current liabilities	16,194	14,475
Note payable, net of current	2,028	0
Operating lease liabilities, non-current	5,065	5,181
Other long-term liabilities	864	1,577
Total liabilities	24,151	21,233
Commitments and contingencies (Note 13)
Stockholders’ equity:
Common stock, $0.001 par value - 142,857 shares authorized, 6,959 and 6,810 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	7	7
Additional paid-in capital	300,139	299,263
Accumulated deficit	(284,564)	(277,112)
Accumulated other comprehensive loss	(1,010)	(1,098)
Total stockholders’ equity	14,572	21,060
Total liabilities and stockholders’ equity	$ 38,723	$ 42,293

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2019.