CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Cash flows from operating activities:
Net (loss) income	$ (1,976,173)	$ (2,581,939)	$ (9,807,667)	$ 12,256
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation and amortization			1,041,762	1,511,147
Share-based payment compensation			851,449	1,098,305
Non-cash professional services expenses			1,540,713	74,642
Restructuring costs			177,389	172,995
Payment of restructuring costs			(63,714)	(469,247)
Loss on disposal of fixed assets			0	45,213
Provision for returns and doubtful accounts			41,970	(20,004)
Deferred income tax (benefit) provision			(273,648)	41,208
Changes in operating assets and liabilities:
Accounts receivable			3,170,149	3,837,502
Prepaid expenses and other current assets			425,663	(73,428)
Inventory			64,353	195,622
Other assets			32,587	15,978
Accounts payable			(271,992)	144,828
Accrued expenses and other long-term liabilities			(1,539,956)	1,010,797
Deferred revenue			(2,517,096)	(11,623,998)
Net cash used in operating activities			(7,128,038)	(4,026,184)
Cash flows from investing activities:
Sales of marketable securities			7,066,000	11,116,000
Purchases of marketable securities			(150,000)	(10,916,401)
Purchases of property and equipment			(132,268)	(741,926)
Proceeds from sale of fixed assets			0	3,130
Capitalized software development costs			0	(14,100)
Security deposits			82,633	193,790
Purchase of intangible assets			(93,167)	(177,826)
Net cash provided by (used in) investing activities			6,773,198	(537,333)
Cash flows from financing activities:
Proceeds from exercise of stock options			0	59,242
Repurchase of common stock			0	(137,859)
Dividends paid on Series A redeemable convertible preferred stock			0	(377,690)
Net cash used in financing activities			0	(456,307)
Effect of exchange rate changes on cash and cash equivalents			(14,932)	(370,688)
Net decrease in cash and cash equivalents			(369,772)	(5,390,512)
Cash and cash equivalents, beginning of period			6,013,382	10,873,891	$ 10,873,891
Cash and cash equivalents, end of period	5,643,610	5,483,379	5,643,610	5,483,379	$ 6,013,382
Supplemental disclosures:
Cash paid for income taxes, net			549,289	158,313
Non-cash investing and financing activities:
Undistributed Series A redeemable convertible preferred stock dividends	$ 194,012	$ 377,690	194,012	377,690
Series A redeemable convertible preferred stock dividend payment			$ 576,779	$ 0