Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 131,699,000		$ 115,464,000
Accounts receivable, net of allowance of $299 and $381, respectively	30,946,000		37,725,000
Deferred tax assets - current portion	2,994,000		3,343,000
Prepaid expenses and other current assets	5,003,000		2,888,000
Total current assets	170,642,000		159,420,000
Property and equipment, net	10,356,000		8,832,000
Deferred tax assets - non-current portion	7,351,000		8,025,000
Other non-current assets	3,460,000		1,161,000
Total assets	191,809,000		177,438,000
Current liabilities:
Accounts payable	1,898,000		803,000
Accrued compensation and related benefits	4,524,000		6,112,000
Accrued and other current liabilities	2,073,000		1,733,000
Deferred revenues – current portion	5,647,000		3,740,000
Total current liabilities	14,142,000		12,388,000
Non-current liabilities	2,886,000		3,227,000
Total liabilities	17,028,000		15,615,000
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding	0		0
Common stock, $0.00015 par value, 70,000 shares authorized: shares issued 37,148 and 36,258, respectively; shares outstanding 31,623 and 31,116, respectively	5,000		5,000
Additional paid-in-capital	260,801,000		248,734,000
Treasury stock at cost, 5,525 and 5,142 shares, respectively	(40,671,000)		(34,048,000)
Accumulated deficit	(44,071,000)		(52,187,000)
Accumulated other comprehensive loss	(1,283,000)		(681,000)
Total stockholders’ equity	174,781,000		161,823,000
Total liabilities and stockholders’ equity	$ 191,809,000		$ 177,438,000