Unaudited Quarterly Results - Schedule of Unaudited Quarterly Results (Details) - USD ($)	3 Months Ended																								12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Net sales	$ 30,201,788		$ 30,570,506		$ 28,359,404		$ 27,054,674		$ 24,508,205		$ 22,519,672		$ 20,386,038		$ 19,350,197		$ 17,720,322		$ 16,698,903		$ 14,846,366		$ 13,885,185		$ 116,186,372	$ 86,764,112	$ 63,150,776
Income (loss) from operations	2,868,688		(2,013,698)		(2,078,083)		(2,424,578)		550,551		(1,338,419)		3,328,420		(2,301,404)		(1,845,139)		(4,182,320)		(3,205,977)		(3,147,240)		(3,647,672)	(6,080,316)	(12,380,676)
Net income (loss)	2,780,262	[1]	(1,675,350)	[1]	(2,228,650)	[1]	(2,587,074)	[1]	(16,446,750)		(9,483,241)		(6,266,803)		(5,142,223)		(5,219,214)		(6,495,643)		(5,253,194)		(4,719,104)		(3,710,812)	(37,339,017)	(21,687,155)
Net income (loss) attributable to common stockholders	$ 2,780,262	[1],[2]	$ (1,675,350)	[1],[2]	$ (2,228,650)	[1],[2]	$ (2,587,074)	[1],[2]	$ (100,642,922)	[2]	$ (12,380,254)	[2]	$ (10,771,077)	[2]	$ (7,485,640)	[2]	$ (7,519,913)	[2]	$ (8,647,369)	[2]	$ (7,364,129)	[2]	$ (6,751,248)	[2]	$ (3,710,812)	$ (131,279,893)	$ (30,282,659)
Basic earnings (loss) per common share	$ 0.08		$ (0.05)		$ (0.07)		$ (0.08)		$ (4.35)		$ (1.19)		$ (0.77)		$ (0.53)		$ (0.72)		$ (0.83)		$ (0.71)		$ (0.65)		$ (0.11)	$ (9.63)	$ (2.91)
Diluted earnings (loss) per common share	$ 0.08		$ (0.05)		$ (0.07)		$ (0.08)		$ (4.35)		$ (1.19)		$ (0.77)		$ (0.53)		$ (0.72)		$ (0.83)		$ (0.71)		$ (0.65)		$ (0.11)	$ (9.63)	$ (2.91)

[1] Fourth quarter includes the reversal of $2.6 million of stock-based compensation expense related to performance based options. See Note 12.

[2] See note 9 for further detail regarding the dividend accretion that is included within net loss attributable to common stockholders.