Significant Accounting Policies - Summary of Computation of Net Income or Loss Per Share (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator:
Net income (loss)	$ 1,100,302	$ 1,183,044	$ 1,311,209	$ 139,153	$ (42,159)	$ 669	$ (171,352)	$ (57,500)	$ 3,733,707	$ (270,342)	$ 3,588,300
Accretion of dividends on preferred stock									1,537,021	2,444,954	2,431,836
Net income (loss) attributable to common stockholders									2,196,686	(2,715,296)	1,156,464
Accretion of dividends on preferred stock									125,205
Adjustment for change in fair value of warrant liability									(460,289)	(85,325)	(2,747,570)
Net income (loss) attributable to common stockholders - diluted									$ 1,861,602	$ (2,800,621)	$ (1,591,106)
Weighted average shares used in calculating income (loss) per share
Basic									3,373,316	651,593	555,805
Diluted									4,667,503	651,593	555,805
Net income (loss) per share:
Basic	$ 0.14	$ 0.21	$ 0.97	$ (0.70)	$ (0.99)	$ (0.93)	$ (1.20)	$ (1.05)	$ 0.65	$ (4.17)	$ 2.08
Diluted	$ 0.12	$ 0.16	$ 0.15	$ (0.82)	$ (0.99)	$ (1.05)	$ (1.22)	$ (1.44)	$ 0.40	$ (4.30)	$ (2.86)