Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 67,490	$ 66,758
Accounts receivable, net of allowance for doubtful accounts of _____ and $254 at March 31, 2015 and December 31, 2014, respectively	7,609	8,274
Prepaid expenses and other current assets	1,117	1,163
Total current assets	76,216	76,195
Property and equipment, net	28,595	26,103
Restricted cash	2,180	1,780
Goodwill	52,848	52,848
Intangible assets, net	11,079	12,132
Other assets	308	226
Total assets	171,226	169,284
Current liabilities
Accounts payable	1,969	1,699
Accrued expenses	9,345	9,874
Deferred revenue, short-term	33,813	31,923
Notes and leases payable, short-term	186	412
Total current liabilities	45,313	43,908
Deferred revenue, long-term	4,100	3,660
Other long-term liabilities	1,087	1,028
Total liabilities	50,500	48,596
Stockholders’ equity
Common stock, $.001 par value; 90,000 shares authorized; _______ and 26,247 shares issued and ______ and 25,588 shares outstanding at March 31, 2015 and December 31, 2014, respectively	26	26
Additional paid in capital	343,435	340,344
Treasury stock, at cost; ____ and 659 shares at March 31, 2015 and December 31, 2014, respectively	(9,867)	(9,923)
Accumulated other comprehensive loss	(382)	(340)
Accumulated deficit	(212,486)	(209,419)
Stockholders' Equity Attributable to Parent	120,726	120,688
Total liabilities, redeemable securities and stockholders’ equity	$ 171,226	$ 169,284