Summary of Significant Accounting Policies, Part 2 (Details) - USD ($)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Cash, Cash Equivalents and Marketable Securities [Abstract]
Impairment losses for other-than-temporary decline in fair value	$ 0	$ 0	$ 0
Money market funds and debt securities	9,300,000	8,700,000
Cash and cash equivalents held in foreign bank accounts	896,000	991,000
Short-term Investments	0	3,451,086
Accounts Receivable [Abstract]
Allowance for doubtful accounts	33,000	45,000
Inventories [Abstract]
Raw materials	3,156,000	136,000
Work-in-process	527,000	25,000
Finished goods	1,143,000	356,000
Inventories	4,825,984	517,217
Inventory adjustments	240,000
Level 2 [Member]
Disclosures About Fair Value of Financial Instruments [Abstract]
Fair value of plan assets		$ 5,603,000
Level 3 [Member]
Disclosures About Fair Value of Financial Instruments [Abstract]
Fair value of plan assets	$ 730,000