CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 98,583	$ 94,415
Accounts receivable, net of allowance for doubtful accounts of $412 at both March 31, 2020 and December 31, 2019	37,694	58,815
Deferred commissions - current	9,102	9,825
Prepaid expenses and other current assets	14,043	11,965
TOTAL CURRENT ASSETS	159,422	175,020
Property and equipment—net	4,066	4,804
Operating lease right-of-use assets	12,564	13,683
Deferred commissions - noncurrent	7,863	8,077
Goodwill	5,475	5,475
Other assets	4,803	5,371
TOTAL ASSETS	194,193	212,430
Current liabilities:
Accounts payable	1,229	1,310
Accrued expenses	15,081	24,792
Lease liabilities - current	5,277	5,664
Unearned revenue - current	84,461	85,153
Customer arrangements with termination rights	13,463	16,130
TOTAL CURRENT LIABILITIES	119,511	133,049
Long-term liabilities:
Lease liabilities - noncurrent	8,786	10,088
Unearned revenue - noncurrent	29,577	33,058
Other long-term liabilities	131	237
TOTAL LIABILITIES	158,005	176,432
Commitments and contingencies (Note 10)
Stockholders’ equity:
Common stock, $0.0001 par value, 300,000,000 shares authorized, 118,540,139 shares issued and 115,369,759 shares outstanding and 115,685,153 shares issued and 112,725,391 shares outstanding at March 31, 2020 and December 31, 2019, respectively	12	11
Additional paid-in capital	517,575	504,041
Treasury stock	(15,825)	(15,141)
Accumulated deficit	(465,574)	(452,913)
TOTAL STOCKHOLDERS’ EQUITY	36,188	35,998
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 194,193	$ 212,430