Acquisitions - Additional Information (Details)						3 Months Ended			9 Months Ended
	Aug. 05, 2015 USD ($) shares	Jun. 11, 2015 USD ($) shares	Jun. 11, 2015 GBP (£) shares	Sep. 22, 2014 USD ($) shares	Sep. 03, 2014 USD ($) shares	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($) shares	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Jun. 11, 2015 GBP (£)
Business Acquisition [Line Items]
Amortization expenses						$ 1,000,000			$ 1,500,000
Total acquisition related costs						2,200,000		$ 1,400,000	3,700,000	$ 1,500,000
REV
Business Acquisition [Line Items]
Initial consideration paid					$ 3,200,000
Consideration paid					$ 4,254,000
Business combination, liabilities recognized									1,700,000
Number of shares of common stock issued | shares					27,407
Share consideration					$ 300,000
Total goodwill									2,800,000
Goodwill acquired, deductible for tax purposes						0			0
Residual value for intangible assets						0			0
Accounts receivable					1,753,000
LAL
Business Acquisition [Line Items]
Initial consideration paid				$ 4,000,000
Consideration paid				$ 4,950,000
Business combination, liabilities recognized									1,800,000
Number of shares of common stock issued | shares				54,604
Share consideration				$ 544,000
Total goodwill									5,600,000
Goodwill acquired, deductible for tax purposes						0			0
Residual value for intangible assets						0			0
Accounts receivable				$ 1,299,000
Moda
Business Acquisition [Line Items]
Earn-out payments, minimum | £											£ 0
Earn-out payments, maximum		$ 800,000									£ 500,000
Consideration paid		$ 1,005,000	£ 650,000
Business combination, liabilities recognized									500,000
Number of shares of common stock issued | shares		16,116	16,116
Share consideration		$ 235,000
Total goodwill									1,400,000
Goodwill acquired, deductible for tax purposes						0			0
Residual value for intangible assets						0			0
Accounts receivable		$ 335,000
Moda | Restricted Stock
Business Acquisition [Line Items]
Number of shares of common stock issued | shares		16,116	16,116
Cross View, Inc.
Business Acquisition [Line Items]
Earn-out payments, minimum	$ 0
Earn-out payments, maximum	18,000,000
Consideration paid	$ 30,740,000
Business combination, liabilities recognized									12,700,000
Number of shares of common stock issued | shares	553,223
Share consideration	$ 6,639,000
Total goodwill									31,000,000
Consideration paid through common stock, value	6,600,000
Accounts receivable	$ 7,698,000					1,200,000			$ 1,200,000
Goodwill amortization tax period									15 years
2015 Earn-out Payments | REV
Business Acquisition [Line Items]
Earn-out payments, minimum						700,000			$ 700,000
Earn-out payments, maximum						1,800,000			1,800,000
Earn-out payable in common stock					$ 200,000
2015 Earn-out Payments | LAL
Business Acquisition [Line Items]
Earn-out payments, maximum						$ 2,000,000			$ 2,000,000
2015 Earn-out Payments | LAL | Maximum
Business Acquisition [Line Items]
Percentage of common stock Issuable				25.00%
2015 Earn-out Payments | Moda | Maximum | Restricted Stock
Business Acquisition [Line Items]
Percentage of common stock Issuable		25.00%	25.00%
2015 Earn-out Payments | Cross View, Inc. | Restricted Stock
Business Acquisition [Line Items]
Percentage of common stock Issuable	20.00%
2014 Earn-out Payments | REV
Business Acquisition [Line Items]
Consideration paid							$ 1,100,000
Number of shares of common stock issued | shares							27,407
Share consideration							$ 300,000
2014 Earn-out Payments | LAL
Business Acquisition [Line Items]
Consideration paid							$ 1,000,000
2016 Earn-out Payments | Moda | Maximum | Restricted Stock
Business Acquisition [Line Items]
Percentage of common stock Issuable		25.00%	25.00%
2016 Earn-out Payments | Cross View, Inc. | Restricted Stock
Business Acquisition [Line Items]
Percentage of common stock Issuable	15.00%
2017 Earn-out Payments | Cross View, Inc. | Restricted Stock
Business Acquisition [Line Items]
Percentage of common stock Issuable	15.00%