Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities
Net loss	$ (6,676)	$ (24,855)	$ (39,622)	$ (18,793)
Adjustments to reconcile net loss to cash used in operating activities
Depreciation and amortization	1,560	7,741	4,525	4,080
Non-cash interest expense	62	(1)	294	0
Increase (Decrease) in Deferred Income Taxes	(1,026)	320	3,642	1,526
Change in fair value of conversion option liability	0	0	(440)	(181)
Share-based compensation	1,583	8,375	12,628	2,676
Issuance of warrants for referral fees	0	0	202	0
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(1,107)	(2,680)	(1,972)	(694)
Prepaid expenses and other assets	(594)	808	(807)	(221)
Deferred revenue, including long-term portion	1,789	9,762	7,240	6,128
Accounts payable	(278)	418	26	181
Accrued expenses and other	(1,437)	1,937	2,459	1,895
Net cash provided by (used in) operating activities	(6,124)	1,825	(11,825)	(3,403)
Cash flows from investing activities
Decrease (increase) in restricted cash	1,000	(1,250)	(530)	(100)
Purchases of property and equipment	(1,351)	(8,133)	(1,786)	(393)
Acquisitions of businesses, net of cash acquired	(34,880)	0	(989)	(12,349)
Net cash used in investing activities	(35,231)	(9,383)	(3,305)	(12,842)
Cash flows from financing activities
Partner’s investment in joint venture	0	0	407	0
Principal payments on loan payable	(10,223)	(246)	(502)	(500)
Payments on capital leases	(190)	(825)	(238)	0
Proceeds from convertible debt and notes payable	0	0	0	13,004
Proceeds from debt issuances	64	0	6,930	0
Repayments of debt		0	(7,964)	0
Proceeds from issuance of warrants	0	0	0	1,660
Proceeds from exercise of options and warrants	2,173	4,135	2,226	321
Payment to Acquire Non-controlling Interest, Equity	0	(1,563)	0	0
Deferred financing costs	(1,032)	0	(151)	0
Proceeds from issuance of common stock in IPO and follow-on offering, net of underwriting discounts and commissions and other offering costs	0	0	138,613	0
Repurchase of common shares	0	(4,092)	(600)	0
Other financing activities	0	0	0	(7)
Net cash provided by (used in) financing activities	(9,208)	(2,591)	138,721	14,478
Effect of changes in foreign exchange rates on cash and cash equivalents	(35)	(223)	(37)	0
Net increase (decrease) in cash and cash equivalents	(50,598)	(10,372)	123,554	(1,767)
Cash and cash equivalents
Beginning of period	127,728	77,130	4,174	5,941
End of period	77,130	66,758	127,728	4,174
Supplemental cash flow data:
Cash paid for interest	56	133	947	625
Issuance of common shares in connection with option exercises for which the Company has not yet received the cash	0	145	0	0
Non-cash investing and financing activities:
Assets acquired under capital lease	0	0	1,676	0
Accrued offering costs	0	0	2,002	0
Reclassification of convertible preferred stock warrant liability to additional paid-in capital upon IPO	0	0	46,684	0
Conversion of convertible notes into common stock upon IPO	0	0	16,784	0
Conversion of Submittal Exchange Holdings Class A preferred units into common stock upon IPO	0	0	7,282	0
Reclassification of redeemable common stock upon IPO	0	0	7,898	0
Fair value of warrants reclassified to equity upon IPO	0	0	435	0
Redeemable Preferred Stock [Member]
Non-cash investing and financing activities:
Accretion of redeemable securities	0	0	3,549	3,373
Redeemable Non-Controlling Interest [Member]
Non-cash investing and financing activities:
Accretion of redeemable securities	$ 70	$ 199	$ 325	$ 0