CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Cash flows from operating activities:
Net (loss) income	$ (3,534,882)	$ (2,668,184)	$ (7,831,494)	$ 2,594,195
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation and amortization			747,974	1,058,581
Share-based payment compensation			637,231	731,584
Non-cash professional services expenses			1,480,725	69,190
Restructuring costs			177,389	157,971
Payment of restructuring costs			(59,510)	(422,868)
Loss on disposal of fixed assets			0	13,185
Provision for returns and doubtful accounts			61,068	17,808
Deferred income tax provision			(265,756)	32,898
Changes in operating assets and liabilities:
Accounts receivable			1,787,845	2,655,194
Prepaid expenses and other current assets			377,103	(176,307)
Inventory			64,353	202,257
Other assets			23,429	41,492
Accounts payable			(42,587)	(100,169)
Accrued expenses and other long-term liabilities			(407,633)	1,472,222
Deferred revenue			(541,348)	(9,994,575)
Net cash used in operating activities			(3,791,211)	(1,647,342)
Cash flows from investing activities:
Sales of marketable securities			6,066,000	6,328,000
Purchases of marketable securities			(150,000)	(6,041,913)
Purchases of property and equipment			(110,421)	(505,357)
Capitalized software development costs			0	(14,100)
Security deposits			82,311	166,003
Purchase of intangible assets			(61,506)	(139,989)
Net cash provided by (used in) investing activities			5,826,384	(207,356)
Cash flows from financing activities:
Proceeds from exercise of stock options			0	42,412
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	(473,137)
Effect of exchange rate changes on cash and cash equivalents			(123,221)	(238,507)
Net increase (decrease) in cash and cash equivalents			1,911,952	(2,566,342)
Cash and cash equivalents, beginning of period			6,013,382	10,873,891	$ 10,873,891
Cash and cash equivalents, end of period	7,925,334	8,307,549	7,925,334	8,307,549	$ 6,013,382
Supplemental disclosures:
Cash paid for income taxes, net			443,908	98,653
Non-cash investing and financing activities:
Undistributed Series A redeemable convertible preferred stock dividends	$ 195,366	$ 186,904	195,366	186,904
Series A redeemable convertible preferred stock dividend payment			$ 381,413	$ 0