Inventory - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Inventory [Line Items]
Adjustments to provision for excess inventory, gross	$ 288,130	$ 76,799	$ 437,893	$ 330,088
Adjustments to provision for excess inventory net of inventory write down	$ 291,692	$ 62,872	383,234	273,752
Write off obsolete inventory			$ 54,659	$ 56,336
Minimum
Inventory [Line Items]
Period of time customers use to evaluate the Company’s equipment			90 days
Maximum
Inventory [Line Items]
Period of time customers use to evaluate the Company’s equipment			180 days