Commitments and Contingencies - Schedule Of Product Warranty Liability included in Accrued Liabilities in Balance Sheets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Beginning balance	$ 50,426	$ 20,213
Cost of warranty claims	(9,814)	(71,404)
Increase (decrease) in warranty reserve	(3,456)	101,617
Ending balance	$ 37,156	$ 50,426