NVE (NVEC) 10-Q 22 Oct 14 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Sep. 30, 2014	Oct. 17, 2014
Document and Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-14	'
Document Fiscal Period Focus	'Q2	'
Document Fiscal Year Focus	'2015	'
Entity Registrant Name	'NVE CORP /NEW/	'
Entity Central Index Key	'0000724910	'
Current Fiscal Year End Date	'--03-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	4,857,953

Balance_Sheets

Balance Sheets (USD $)	Sep. 30, 2014	Mar. 31, 2014
ASSETS	'	'
Cash and cash equivalents	$3,281,500	$1,262,300
Marketable securities, short term	14,624,615	12,360,091
Accounts receivable, net of allowance for uncollectible accounts of $15,000	3,678,396	2,331,574
Inventories	3,389,393	3,207,333
Deferred tax assets	169,671	237,387
Prepaid expenses and other assets	848,528	816,276
Total current assets	25,992,103	20,214,961
Fixed assets	'	'
Machinery and equipment	8,563,720	8,536,010
Leasehold improvements	1,499,454	1,499,454
Gross fixed assets	10,063,174	10,035,464
Less accumulated depreciation	7,495,209	7,030,692
Net fixed assets	2,567,965	3,004,772
Marketable securities, long term	84,551,529	82,022,310
Total assets	113,111,597	105,242,043
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'
Accounts payable	337,462	374,127
Accrued payroll and other	855,927	808,675
Total current liabilities	1,193,389	1,182,802
Deferred Tax Liabilities, Net, Noncurrent	224,769	354,600
Shareholders' equity	'	'
Common stock, $0.01 par value, 6,000,000 shares authorized; 4,857,953 issued and outstanding as of September 30, 2014 and 4,851,043 issued and outstanding as of March 31, 2014	48,580	48,510
Additional paid-in capital	20,850,762	20,464,883
Accumulated other comprehensive income	567,974	877,857
Retained earnings	90,226,123	82,313,391
Total shareholders' equity	111,693,439	103,704,641
Total liabilities and shareholders' equity	$113,111,597	$105,242,043

Balance_Sheets_Parenthetical

Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Balance Sheets	'	'
Accounts receivable, allowance for uncollectible accounts	$15,000	$15,000
Common stock par value	$0.01	$0.01
Common stock, shares authorized	6,000,000	6,000,000
Common stock shares, issued	4,857,953	4,851,043
Common stock shares, outstanding	4,857,953	4,851,043

Statements_Of_Income

Statements Of Income (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue	'	'	'	'
Product sales	$8,113,806	$7,231,149	$16,461,887	$13,205,755
Contract research and development	153,567	70,031	258,521	272,358
Total revenue	8,267,373	7,301,180	16,720,408	13,478,113
Cost of sales	1,609,632	1,503,546	3,167,978	2,881,901
Gross profit	6,657,741	5,797,634	13,552,430	10,596,212
Expenses	'	'	'	'
Selling, general , and administrative	625,599	660,076	1,255,249	1,212,880
Research and development	787,279	876,463	1,590,707	1,839,374
Total expenses	1,412,878	1,536,539	2,845,956	3,052,254
Income from operations	5,244,863	4,261,095	10,706,474	7,543,958
Interest income	562,923	520,802	1,111,477	1,047,141
Income before taxes	5,807,786	4,781,897	11,817,951	8,591,099
Provision for income taxes	1,932,164	1,552,246	3,905,219	2,794,623
Net income	$3,875,622	$3,229,651	$7,912,732	$5,796,476
Net income per share - basic	$0.80	$0.67	$1.63	$1.19
Net income per share - diluted	$0.80	$0.66	$1.63	$1.19
Weighted average shares outstanding	'	'	'	'
Basic	4,855,071	4,852,178	4,853,068	4,857,279
Diluted	4,872,029	4,873,106	4,868,769	4,878,599

Statements_of_Comprehensive_In

Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Comprehensive Income [Abstract]	'	'	'	'
Net income	$3,875,622	$3,229,651	$7,912,732	$5,796,476
Unrealized loss from marketable securities, net of tax	-404,731	244,389	-309,883	-610,646
Comprehensive income	$3,470,891	$3,474,040	$7,602,849	$5,185,830

Statements_Of_Cash_Flows

Statements Of Cash Flows (USD $)	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
OPERATING ACTIVITIES	'	'
Net income	$7,912,732	$5,796,476
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation	464,517	380,272
Stock-based compensation	58,960	53,200
Excess tax benefits	-24,288	0
Deferred income taxes	138,992	28,457
Changes in operating assets and liabilities:	'	'
Accounts receivable	-1,346,822	-509,632
Inventories	-182,060	236,147
Prepaid expenses and other assets	-32,252	63,341
Accounts payable and other current liabilities	10,587	-54,230
Net cash provided by operating activities	7,000,366	5,994,031
INVESTING ACTIVITIES	'	'
Purchases of fixed assets	-27,710	0
Purchases of marketable securities	-9,280,445	-11,533,738
Proceeds from maturities and sales of marketable securities	4,000,000	5,855,000
Net cash used in investing activities	-5,308,155	-5,678,738
FINANCING ACTIVITIES	'	'
Net proceeds from sale of common stock	302,701	0
Excess tax benefits	24,288	0
Repurchase of common stock	0	-1,263,405
Net cash provided by financing activities	326,989	-1,263,405
Increase in cash and cash equivalents	2,019,200	-948,112
Cash and cash equivalents at beginning of period	1,262,300	2,509,683
Cash and cash equivalents at end of period	3,281,500	1,561,571
Supplemental disclosures of cash flow information:	'	'
Cash paid during the period for income taxes	$3,760,500	$2,838,033

Description_Of_Business

Description Of Business	6 Months Ended
	Sep. 30, 2014
Description Of Business [Abstract]	'
Description Of Business	'
	NOTE 1. DESCRIPTION OF BUSINESS
	We develop and sell devices that use spintronics, a nanotechnology that relies on electron spin rather than electron charge to acquire, store, and transmit information.

Interim_Financial_Information

Interim Financial Information	6 Months Ended
	Sep. 30, 2014
Interim Financial Information [Abstract]	'
Interim Financial Information	'
	NOTE 2. INTERIM FINANCIAL INFORMATION
	The accompanying unaudited financial statements of NVE Corporation are prepared consistent with accounting principles generally accepted in the United States and in accordance with Securities and Exchange Commission rules and regulations. In the opinion of management, these financial statements reflect all adjustments, consisting only of normal and recurring adjustments, necessary for a fair presentation of the financial statements. Although we believe that the disclosures are adequate to make the information presented not misleading, it is suggested that these unaudited financial statements be read in conjunction with the audited financial statements and the notes included in our latest annual financial statements included in our Annual Report on Form 10-K for the fiscal year ended March 31, 2014. The results of operations for the quarter or six months ended September 30, 2014 are not necessarily indicative of the results that may be expected for the full fiscal year ending March 31, 2015.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	6 Months Ended
	Sep. 30, 2014
Recent Accounting Pronouncements [Abstract]	'
Recent Accounting Pronouncements	'
	NOTE 3. RECENT ACCOUNTING PRONOUNCEMENTS
	In May 2014, the Financial Accounting Standards Board issued Accounting Standard Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification 605, Revenue Recognition. ASU 2014-09 is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. It also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. ASU 2014-09 is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period, which will be our first quarter of fiscal 2018. We have not yet evaluated the impact of ASU 2014-09 on our financial statements.

Net_Income_Per_Share

Net Income Per Share	6 Months Ended
	Sep. 30, 2014
Net Income Per Share [Abstract]	'
Net Income Per Share	'
	NOTE 4. NET INCOME PER SHARE
	Net income per basic share is computed based on the weighted-average number of common shares issued and outstanding during each period. Net income per diluted share amounts assume conversion, exercise or issuance of all potential common stock instruments (stock options and warrants). Stock options totaling 4,000 for the quarter and six months ended September 30, 2014 and 13,000 for the quarter and six months ended September 30, 2013 were not included in the computation of diluted earnings per share because the exercise prices of the options were greater than the market price of the common stock and are considered anti-dilutive. The following table reflects the components of common shares outstanding:
		Quarter Ended Sept. 30
		2014	2013
	Weighted average common shares outstanding basic	4,855,071	4,852,178
	Effect of dilutive securities:
	Stock options	16,958	20,435
	Warrants	-	493
	Shares used in computing net income per share diluted	4,872,029	4,873,106
		Six Months Ended Sept. 30
		2014	2013
	Weighted average common shares outstanding basic	4,853,068	4,857,279
	Effect of dilutive securities:
	Stock options	15,701	20,798
	Warrants	-	522
	Shares used in computing net income per share diluted	4,868,769	4,878,599

Marketable_Securities

Marketable Securities	6 Months Ended
	Sep. 30, 2014
Marketable Securities [Abstract]	'
Marketable Securities	'
	NOTE 5. MARKETABLE SECURITIES
	All of our marketable securities are classified as available-for-sale. Marketable securities with remaining maturities less than one year are classified as short-term, and those with remaining maturities greater than one year are classified as long-term. The fair value of our marketable securities as of September 30, 2014, by maturity, were as follows:
	Total			<1 Year			1-3 Years			3-5 Years
	$	99,176,144		$	14,624,615		$	46,756,649		$	37,794,880
	As of September 30 and March 31, 2014, our marketable securities were as follows:
		As of September 30, 2014													As of March 31, 2014
					Gross			Gross				Fair						Gross			Gross			Fair
		Adjusted			Unrealized			Unrealized				Market			Adjusted			Unrealized			Unrealized			Market
		Cost			Gains			Losses				Value			Cost			Gains			Losses			Value
	Corporate bonds	$	95,870,410		$	1,137,401		$	(252,010	)		$	96,755,801		$	88,567,210		$	1,613,822		$	(246,973	)	$	89,934,059
	Municipal bonds	2,413,675			6,668			-				2,420,343			4,436,430			16,521			(4,609		)	4,448,342
	Total	$	98,284,085		$	1,144,069		$	(252,010	)		$	99,176,144		$	93,003,640		$	1,630,343		$	(251,582	)	$	94,382,401
	The following table shows the gross unrealized losses and fair value of our investments with unrealized losses, aggregated by investment category and length of time that individual securities had been in a continuous unrealized loss position as of September 30 and March 31, 2014:
			Less Than 12 Months							12 Months or Greater							Total
			Fair			Gross				Fair			Gross				Fair			Gross
			Market			Unrealized				Market			Unrealized				Market			Unrealized
			Value			Losses				Value			Losses				Value			Losses
	As of September 30, 2014
		Corporate bonds	$	29,377,477		$	(172,907	)		$	8,368,641		$	(79,103	)		$	37,746,118		$	(252,010	)
		Municipal bonds	-			-				-			-				-			-
		Total	$	29,377,477		$	(172,907	)		$	8,368,641		$	(79,103	)		$	37,746,118		$	(252,010	)
	As of March 31, 2014
		Corporate bonds	$	34,761,683		$	(246,973	)		$	-		$	-			$	34,761,683		$	(246,973	)
		Municipal bonds	1,418,742			(4,609		)		-			-				1,418,742			(4,609		)
		Total	$	36,180,425		$	(251,582	)		$	-		$	-			$	36,180,425		$	(251,582	)
	Gross unrealized losses totaled $252,010 as of September 30, 2014, and were attributed to 12 corporate bonds out of a portfolio of 40 bonds. The gross unrealized losses were due to market-price decreases and rating downgrades after the bonds were purchased.
	All of the bonds we held had investment-grade credit ratings by Moodys or Standard and Poors. For each bond with an unrealized loss, we expect to recover the entire cost basis of each security based on our consideration of factors including their credit ratings, the underlying ratings of insured bonds, and historical default rates for securities of comparable credit rating.
	Three corporate bonds, with a total fair market value of $8,368,641, had been in continuous unrealized loss positions for 12 months or greater. For these securities, we also considered the severity of unrealized losses, which was less than 1% of adjusted cost for each security.
	Because we expect to recover the costs basis of investments held, we do not consider any of our marketable securities to be other-than-temporarily impaired at September 30, 2014.

Inventories

Inventories	6 Months Ended
	Sep. 30, 2014
Inventories [Abstract]	'
Inventories	'
	NOTE 6. INVENTORIES
	Inventories consisted of the following:
		Sept. 30			31-Mar
		2014			2014
	Raw materials	$	898,089		$	776,510
	Work in process		2,087,528			1,940,809
	Finished goods	658,776			785,014
			3,644,393			3,502,333
	Less inventory reserve	(255,000		)	(295,000		)
	Total inventories	$	3,389,393		$	3,207,333

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Sep. 30, 2014
Stock-Based Compensation [Abstract]	'
Stock-Based Compensation	'
	NOTE 7. STOCK-BASED COMPENSATION
	Stock-based compensation expense was $58,960 for the second quarter and first six months of fiscal 2015, and $53,200 for the second quarter and first six months of fiscal 2014. Stock-based compensation expenses for the quarters and six months ended September 30, 2014 and 2013 were due to the issuance of automatic stock options to our non-employee directors on their election or reelection to our Board. We calculate the share-based compensation expense using the Black-Scholes standard option-pricing model.

Income_Taxes

Income Taxes	6 Months Ended
	Sep. 30, 2014
Income Taxes [Abstract]	'
Income Taxes	'
	NOTE 8. INCOME TAXES
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes.
	We had no unrecognized tax benefits as of September 30, 2014 or March 31, 2014, and we do not expect any significant unrecognized tax benefits within 12 months of the reporting date. We recognize interest and penalties related to income tax matters in income tax expense. As of September 30, 2014 we had no accrued interest related to uncertain tax positions. The tax years 1999 through 2013 remain open to examination by the major taxing jurisdictions to which we are subject.

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Sep. 30, 2014
Fair Value Measurements [Abstract]	'
Fair Value Measurements	'
	NOTE 9. FAIR VALUE MEASUREMENTS
	Generally accepted accounting principles establish a framework for measuring fair value, provide a definition of fair value and prescribe required disclosures about fair-value measurements. Generally accepted accounting principles define fair value as the price that would be received to sell an asset or paid to transfer a liability. Fair value is a market-based measurement that should be determined using assumptions that market participants would use in pricing an asset or liability. Generally accepted accounting principles utilize a valuation hierarchy for disclosure of fair value measurements. The categorization within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement. The categories within the valuation hierarchy are described as follows:
	Level 1 Financial instruments with quoted prices in active markets for identical assets or liabilities. Our Level 1 financial instruments consist of publicly-traded marketable corporate debt securities, which are classified as available-for-sale. On the balance sheets, these securities are included in Marketable securities, short term and Marketable securities, long term. The fair value of our Level 1 marketable securities was $96,755,801 at September 30, 2014 and $89,934,059 at March 31, 2014.
	Level 2 Financial instruments with quoted prices in active markets for similar assets or liabilities. Level 2 fair value measurements are determined using either prices for similar instruments or inputs that are either directly or indirectly observable, such as interest rates. Our Level 2 financial instruments consist of municipal debt securities, which are classified as available-for-sale. On the balance sheets, these securities are included in Marketable securities, short term and Marketable securities, long term. The fair value of our Level 2 marketable securities was $2,420,343 at September 30, 2014 and $4,448,342 at March 31, 2014.
	Level 3 Inputs to the fair value measurement are unobservable inputs or valuation techniques. We do not have any financial assets or liabilities being measured at fair value that are classified as Level 3 financial instruments.

Stock_Repurchase_Plan

Stock Repurchase Plan	6 Months Ended
	Sep. 30, 2014
Stock Repurchase Plan [Abstract]	'
Stock Repurchase Plan	'
	NOTE 10. STOCK REPURCHASE PLAN
	On January 21, 2009 we announced that our Board of Directors authorized the repurchase of up to $2,500,000 of our Common Stock, $1,236,595 of which remained available as of September 30, 2014. The repurchase program may be modified or discontinued at any time without notice. We did not repurchase any of our Common Stock during the quarter ended September 30, 2014.

Net_Income_Per_Share_Tables

Net Income Per Share (Tables)	6 Months Ended
	Sep. 30, 2014
Net Income Per Share [Abstract]	'
Schedule Of Weighted Average Number Of Shares	'
		Quarter Ended Sept. 30
		2014	2013
	Weighted average common shares outstanding basic	4,855,071	4,852,178
	Effect of dilutive securities:
	Stock options	16,958	20,435
	Warrants	-	493
	Shares used in computing net income per share diluted	4,872,029	4,873,106
		Six Months Ended Sept. 30
		2014	2013
	Weighted average common shares outstanding basic	4,853,068	4,857,279
	Effect of dilutive securities:
	Stock options	15,701	20,798
	Warrants	-	522
	Shares used in computing net income per share diluted	4,868,769	4,878,599

Marketable_Securities_Tables

Marketable Securities (Tables)	6 Months Ended
	Sep. 30, 2014
Marketable Securities [Abstract]	'
Fair Value Of Marketable Securities By Maturity	'
	Total			<1 Year			1-3 Years			3-5 Years
	$	99,176,144		$	14,624,615		$	46,756,649		$	37,794,880
Amortized Cost And Approximate Fair Values Of Marketable Securities	'
		As of September 30, 2014													As of March 31, 2014
					Gross			Gross				Fair						Gross			Gross			Fair
		Adjusted			Unrealized			Unrealized				Market			Adjusted			Unrealized			Unrealized			Market
		Cost			Gains			Losses				Value			Cost			Gains			Losses			Value
	Corporate bonds	$	95,870,410		$	1,137,401		$	(252,010	)		$	96,755,801		$	88,567,210		$	1,613,822		$	(246,973	)	$	89,934,059
	Municipal bonds	2,413,675			6,668			-				2,420,343			4,436,430			16,521			(4,609		)	4,448,342
	Total	$	98,284,085		$	1,144,069		$	(252,010	)		$	99,176,144		$	93,003,640		$	1,630,343		$	(251,582	)	$	94,382,401
Gross Unrealized Losses And Fair Values Of Investments By Investment Category And Length Of Time	'
			Less Than 12 Months							12 Months or Greater							Total
			Fair			Gross				Fair			Gross				Fair			Gross
			Market			Unrealized				Market			Unrealized				Market			Unrealized
			Value			Losses				Value			Losses				Value			Losses
	As of September 30, 2014
		Corporate bonds	$	29,377,477		$	(172,907	)		$	8,368,641		$	(79,103	)		$	37,746,118		$	(252,010	)
		Municipal bonds	-			-				-			-				-			-
		Total	$	29,377,477		$	(172,907	)		$	8,368,641		$	(79,103	)		$	37,746,118		$	(252,010	)
	As of March 31, 2014
		Corporate bonds	$	34,761,683		$	(246,973	)		$	-		$	-			$	34,761,683		$	(246,973	)
		Municipal bonds	1,418,742			(4,609		)		-			-				1,418,742			(4,609		)
		Total	$	36,180,425		$	(251,582	)		$	-		$	-			$	36,180,425		$	(251,582	)

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Sep. 30, 2014
Inventories [Abstract]	'
Schedule Of Inventories	'
		Sept. 30			31-Mar
		2014			2014
	Raw materials	$	898,089		$	776,510
	Work in process		2,087,528			1,940,809
	Finished goods	658,776			785,014
			3,644,393			3,502,333
	Less inventory reserve	(255,000		)	(295,000		)
	Total inventories	$	3,389,393		$	3,207,333

Net_Income_Per_Share_Details

Net Income Per Share (Details)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Income Per Share [Abstract]	'	'	'	'
Weighted average common shares outstanding - basic	4,855,071	4,852,178	4,853,068	4,857,279
Stock options	16,958	20,435	15,701	20,798
Warrants	'	493	'	522
Shares used in computing net income per share - diluted	4,872,029	4,873,106	4,868,769	4,878,599
Stock options and warrants not included in computation of diluted earnings per share	4,000	'	4,000	13,000

Marketable_Securities_Narrativ

Marketable Securities (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
	Sep. 30, 2014	Mar. 31, 2014
Schedule of Investments [Line Items]	'	'
Gross unrealized losses	$252,010	$251,582
Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Market Value	8,368,641	'
Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	79,103	'
Municipal Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Gross unrealized losses	'	$4,609

Marketable_Securities_Fair_Val

Marketable Securities (Fair Value Of Marketable Securities By Maturity) (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Marketable Securities [Abstract]	'	'
Fair Market Value	$99,176,144	$94,382,401
Marketable securities, debt maturities due within one year, fair value	14,624,615	'
Marketable securities, debt maturities due after one year through three years, fair value	46,756,649	'
Marketable securities, debt maturities due after three years through five years, fair value	$37,794,880	'

Marketable_Securities_Amortize

Marketable Securities (Amortized Cost And Approximate Fair Values Of Marketable Securities) (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Schedule of Investments [Line Items]	'	'
Adjusted Cost	$98,284,085	$93,003,640
Gross Unrealized Gains	1,144,069	1,630,343
Gross Unrealized Losses	-252,010	-251,582
Fair Market Value	99,176,144	94,382,401
Corporate Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Adjusted Cost	95,870,410	88,567,210
Gross Unrealized Gains	1,137,401	1,613,822
Gross Unrealized Losses	-252,010	-246,973
Fair Market Value	96,755,801	89,934,059
Municipal Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Adjusted Cost	2,413,675	4,436,430
Gross Unrealized Gains	6,668	16,521
Gross Unrealized Losses	'	-4,609
Fair Market Value	$2,420,343	$4,448,342

Marketable_Securities_Gross_Un

Marketable Securities (Gross Unrealized Losses And Fair Values Of Investments By Investment Category And Length Of Time) (Details) (USD $)	6 Months Ended	12 Months Ended
	Sep. 30, 2014	Mar. 31, 2014
Schedule of Investments [Line Items]	'	'
Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Market Value	$29,377,477	$36,180,425
Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	-172,907	-251,582
Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Market Value	8,368,641	'
Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	-79,103	'
Marketable Securities, Continuous Unrealized Loss Position, Fair Market Value, Total	37,746,118	36,180,425
Marketable Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	-252,010	-251,582
Corporate Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Market Value	29,377,477	34,761,683
Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	-172,907	-246,973
Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Greater, Fair Market Value	8,368,641	'
Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Greater, Gross Unrealized Losses	-79,103	'
Marketable Securities, Continuous Unrealized Loss Position, Fair Market Value, Total	37,746,118	34,761,683
Marketable Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	-252,010	-246,973
Municipal Bonds [Member]	'	'
Schedule of Investments [Line Items]	'	'
Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Market Value	'	1,418,742
Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Gross Unrealized Losses	'	-4,609
Marketable Securities, Continuous Unrealized Loss Position, Fair Market Value, Total	'	1,418,742
Marketable Securities, Continuous Unrealized Loss Position, Gross Unrealized Losses, Total	'	($4,609)

Inventories_Details

Inventories (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Inventories [Abstract]	'	'
Raw materials	$898,089	$776,510
Work in process	2,087,528	1,940,809
Finished goods	658,776	785,014
Inventory, Gross, Total	3,644,393	3,502,333
Less inventory reserve	-255,000	-295,000
Total inventories	$3,389,393	$3,207,333

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Stock-Based Compensation [Abstract]	'	'
Share-based compensation	$58,960	$53,200

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Sep. 30, 2014	Mar. 31, 2014
Available-for-sale securities, fair value	$99,176,144	$94,382,401
Fair Value, Inputs, Level 1 [Member]	'	'
Available-for-sale securities, fair value	96,755,801	89,934,059
Fair Value, Inputs, Level 2 [Member]	'	'
Available-for-sale securities, fair value	$2,420,343	$4,448,342

Stock_Repurchase_Plan_Details

Stock Repurchase Plan (Details) (USD $)	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jan. 21, 2009
Stock Repurchase Plan [Abstract]	'	'	'
Repurchase of common stock	$0	$1,263,405	'
Authorized common stock for repurchase	'	'	2,500,000
Remaining authorized common stock for repurchase	$1,236,595	'	'