XML 39 R28.htm IDEA: XBRL DOCUMENT v3.8.0.1
Short-Term Investments (Tables)
 6 Months Ended
Sep. 30, 2017
Summary of Investment Holdings [Line Items]  
Schedule of amortized cost and fair value of investment securities held-to-maturity
   Investment Securities Held-to-Maturity  Estimated 
   

Amortized

Cost

  

Unrealized

Gains

  

Unrealized

Losses

  fair value 
 At September 30, 2017            
 Corporate debt securities $1,997,792  $—  $—  $1,997,792 
 Other debt securities  —   —   —   — 
   $1,997,792  $—  $—  $1,997,792 
 At March 31, 2017                
 Corporate debt securities $—  $—  $—  $— 
 Other debt securities  —   —   —   — 
   $—  $—  $—  $— 
Investment securities [Member]  
Summary of Investment Holdings [Line Items]  
Schedule of amortized cost and fair value of investment securities held-to-maturity
   September 30,
2017		  March 31,
2017		 
 Due in one year or less $1,997,792  $— 
 Due after one year through five years  —   — 
 Due after five years through ten years  —   — 
 Due after ten years  —   — 
 Total $1,997,792  $—