Marketable Securities (Tables)
 9 Months Ended
Dec. 31, 2013
Marketable Securities [Abstract]  
Fair Value Of Marketable Securities By Maturity
Total <1 Year 1–3 Years 3–5 Years
$ 90,877,946 $ 10,293,147 $ 37,031,172 $ 43,553,627
Amortized Cost And Approximate Fair Values Of Marketable Securities
As of December 31, 2013 As of March 31, 2013

Adjusted
Cost		 Gross
Unrealized
Gains		 Gross
Unrealized
Losses		 Fair
Market
Value
Adjusted
Cost		 Gross
Unrealized
Gains		 Gross
Unrealized
Losses		 Fair
Market
Value
Corporate bonds $ 84,677,016 $ 1,716,210 $ (493,700 ) $ 85,899,526 $ 72,923,502 $ 2,378,845 $ (4,187 ) $ 75,298,160
Municipal bonds 4,951,910 30,521 (4,011 ) 4,978,420 7,381,223 81,058
 (9,155 ) 7,453,126
Total $ 89,628,926 $ 1,746,731 $ (497,711 ) $ 90,877,946 $ 80,304,725 $ 2,459,903 $ (13,342 ) $ 82,751,286
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
Market
Value		 Gross
Unrealized
Losses		 Fair
Market
Value		 Gross
Unrealized
Losses		 Fair
Market
Value		 Gross
Unrealized
Losses
As of December 31, 2013
Corporate bonds $ 32,852,596 $ (493,700 ) $ - $ - $ 32,852,596 $ (493,700 )
Municipal bonds 1,429,217 (4,011 ) - - 1,429,217 (4,011 )
Total $ 34,281,813 $ (497,711 ) $ - $ - $ 34,281,813 $ (497,711 )
As of March 31, 2013
Corporate bonds $ 1,171,976 $ (4,187 ) $ - $ - $ 1,171,976 $ (4,187 )
Municipal bonds 508,607 (9,155 ) - - 508,607 (9,155 )
Total $ 1,680,583 $ (13,342 ) $ - $ - $ 1,680,583 $ (13,342 )