10. Income Taxes - Components of Net Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current deferred tax asset (liability):
Inventory reserve	$ 60,794	$ 66,000
Warranty reserve	7,148	7,109
Net operating loss carryforward	1,940,670	876,483
Valuation allowance	(2,008,612)	(949,592)
Total current	0	0
Long-term deferred tax asset (liability)
Long-lived assets	124,515	136,132
Valuation allowance	(124,515)	(136,132)
Total long-term	0	0
Net deferred tax asset (liability)	$ 0	$ 0