Consolidated Balance Sheets - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 28,789,000	$ 22,402,000
Short-term investments	12,200,000	16,541,000
Accounts receivable, net of allowance for doubtful accounts of $3,456 and $3,296 at March 31, 2017 and December 31, 2016, respectively	15,793,000	16,371,000
Prepaid expenses and other current assets	20,674,000	17,002,000
Total current assets	77,456,000	72,316,000
Property, equipment and software, net	80,494,000	82,714,000
Goodwill	1,145,000	1,145,000
Amortizable intangible assets, net	1,054,000	1,219,000
Total assets	160,149,000	157,394,000
Liabilities and stockholders’ equity
Accounts payable	4,179,000	2,886,000
Accrued liabilities	22,466,000	23,128,000
Less current maturities	2,250,000	1,500,000
Total current liabilities	92,027,000	93,019,000
Long-term debt, net	55,629,000	56,142,000
Other liabilities, noncurrent	726,000	1,245,000
Total liabilities	150,447,000	152,894,000
Commitments and contingencies (Note 8)	0	0
Stockholders’ equity:
Preferred stock, $0.001 par value: 10,000,000 shares authorized, no shares issued or outstanding at March 31, 2017 and December 31, 2016	0	0
Common stock, $0.001 par value: 300,000,000 shares authorized, 68,262,657 and 67,979,486 shares issued and 59,702,135 and 59,420,774 shares outstanding at March 31, 2017 and December 31, 2016, respectively	68,000	68,000
Additional paid-in-capital	293,419,000	290,182,000
Treasury stock, at cost: 8,560,522 and 8,558,712 shares of common stock at March 31, 2017 and December 31, 2016, respectively	(23,734,000)	(23,719,000)
Accumulated deficit	(260,051,000)	(262,031,000)
Total stockholders’ equity	9,702,000	4,500,000
Total liabilities and stockholders’ equity	160,149,000	157,394,000
Deferred membership revenue [Member]
Liabilities and stockholders’ equity
Deferred revenue, current	20,448,000	23,208,000
Deferred revenue, noncurrent	1,624,000	2,032,000
Deferred advertising revenue [Member]
Liabilities and stockholders’ equity
Deferred revenue, current	42,684,000	42,297,000
Deferred revenue, noncurrent	$ 441,000	$ 456,000

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Balance Type:	credit
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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.