CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 94,415	$ 104,613
Short-term investments		1,000
Accounts receivable, net of allowance for doubtful accounts of $412 and $425 at December 31, 2019 and December 31, 2018, respectively	58,815	60,994
Deferred commissions - current	9,825	8,265
Prepaid expenses and other current assets	11,965	8,367
TOTAL CURRENT ASSETS	175,020	183,239
Property and equipment—net	4,804	7,046
Operating lease right-of-use assets	13,683
Deferred commissions - noncurrent	8,077	9,066
Goodwill	5,475	5,475
Other assets	5,371	5,561
TOTAL ASSETS	212,430	210,387
Current liabilities:
Accounts payable	1,310	2,154
Accrued expenses	24,792	27,347
Lease liabilities - current	5,664
Unearned revenue - current	85,153	74,177
Customer arrangements with termination rights	16,130	19,367
TOTAL CURRENT LIABILITIES	133,049	123,045
Long-term liabilities:
Lease liabilities - noncurrent	10,088
Unearned revenue - noncurrent	33,058	31,660
Other long-term liabilities	237	1,565
TOTAL LIABILITIES	176,432	156,270
Commitments and contingencies (Note 12)
Stockholders’ equity:
Common stock, $0.0001 par value, 300,000,000 shares authorized, 115,685,153 and 107,028,433 shares issued, and 112,725,391 and 106,206,545 shares outstanding, at December 31, 2019 and 2018, respectively	11	11
Additional paid-in capital	504,041	462,004
Treasury stock	(15,141)	(3,831)
Accumulated deficit	(452,913)	(404,067)
TOTAL STOCKHOLDERS’ EQUITY	35,998	54,117
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 212,430	$ 210,387