Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2016	Apr. 30, 2015
Current assets:
Cash and cash equivalents	$ 57,944	$ 54,041
Short-term investments	50,975	52,730
Accounts receivable, net of allowance for doubtful accounts of $2,713 and $3,992 as of January 31, 2016 and April 30, 2015, respectively	39,082	49,532
Prepaid expenses and other current assets	9,030	12,977
Total current assets	157,031	169,280
Property, equipment and capitalized internal-use software development costs, net	30,117	19,054
Goodwill	139,155	139,155
Acquired intangible assets, net	10,080	11,498
Other non-current assets	4,683	3,974
Total assets	341,066	342,961
Current liabilities:
Accounts payable	5,620	3,539
Accrued expenses and other current liabilities	22,800	27,397
Deferred revenue	60,759	60,400
Total current liabilities	89,179	91,336
Long-term liabilities:
Revolving line of credit	57,000	57,000
Deferred revenue less current portion	2,397	2,530
Other liabilities, long-term	5,833	712
Total liabilities	$ 154,409	$ 151,578
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock – $0.0001 par value; 150,000,000 shares authorized, 81,673,833 shares issued and 81,473,833 shares outstanding as of January 31, 2016; 150,000,000 shares authorized, 80,346,488 shares issued and 80,146,488 shares outstanding at April 30, 2015	$ 8	$ 8
Treasury stock, at cost – 200,000 shares as of January 31, 2016 and April 30, 2015	0	0
Additional paid-in capital	432,552	418,509
Accumulated other comprehensive loss	(1,197)	(638)
Accumulated deficit	(244,706)	(226,496)
Total stockholders’ equity	186,657	191,383
Total liabilities and stockholders’ equity	$ 341,066	$ 342,961