Marketable Securities
 9 Months Ended
Dec. 31, 2013
Marketable Securities [Abstract]  
Marketable Securities
NOTE 5. MARKETABLE SECURITIES
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 December 31, 2013, by maturity, were as follows:
Total <1 Year 1–3 Years 3–5 Years
$ 90,877,946 $ 10,293,147 $ 37,031,172 $ 43,553,627

As of December 31 and March 31, 2013, our marketable securities were as follows:
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

The following table presents 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 December 31 and March 31, 2013:
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 )

Gross unrealized losses totaled $497,711 as of December 31, 2013, and were attributed to ten corporate bonds and one municipal bond out of a portfolio of 41 bonds. The gross unrealized losses were due to market-price decreases and rating downgrades after the bonds were purchased, and none had been in a continuous unrealized loss position for 12 months or greater. A substantial majority of the bonds we held were rated by Moody's or Standard and Poor's and had investment-grade credit ratings. For each bond, including 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. Because we expect to recover the entire cost basis of each of the securities, and because we do not intend to sell the securities and it is not more likely than not that we will be required to sell the securities before recovery of the cost basis, which may be maturity, we did not consider any of our marketable securities to be other-than-temporarily impaired at December 31, 2013.