7. Income Taxes (Details) - Schedule of Deferred Tax Assets and Liabilities - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Schedule of Deferred Tax Assets and Liabilities [Abstract]
Net operating loss carryforwards	$ 1,482,880	$ 1,645,868
Tax credits	329,032	329,032
Charitable contributions	85	102
Legal damages	1,070,763	956,000
Allowance for doubtful accounts	1,587	2,561
Reserve for inventory obsolescence	88,878	112,671
Inventory capitalization	100,604	105,998
Vacation accrual	73,403	133,276
Warranty reserve	23,697	64,340
Deferred revenues	84,165	162,757
Stock options	15,801	25,494
Non-compete agreement	1,306	5,941
AMT credit	63,500	66,106
Depreciation	5,533	18,412
Deferred tax asset	3,341,234	3,628,558
Less valuation allowance	(3,277,734)	(3,628,558)
Deferred tax asset, net	$ 63,500	$ 0