ÌÒÖ­Ó°Ôº

Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Preferred Stock, Common Stock, Treasury Stock and Warrants Narrative) (Details)

v3.10.0.1
Stockholders' Equity (Preferred Stock, Common Stock, Treasury Stock and Warrants Narrative) (Details) - USD ($)
 3 Months Ended
Jul. 31, 2018
Jul. 19, 2018
Apr. 30, 2018
Stockholders Equity [Line Items]      
Preferred stock, shares authorized 10,000,000   10,000,000
Preferred stock, shares issued 0   0
Preferred stock, shares outstanding 0   0
Per share price $ 0.001   $ 0.001
Stock issuance costs paid by third parties $ 30,000    
Preferred Stock [Member]      
Stockholders Equity [Line Items]      
Preferred stock, shares authorized 10,000,000   10,000,000
Preferred stock, shares issued 0   0
Preferred stock, shares outstanding 0   0
Common Stock [Member]      
Stockholders Equity [Line Items]      
Share issued in exercise of stock options 2,689    
Proceeds from stock options exercised $ 7,817    
Treasury stock repurchased   1,000,000  
Per share price   $ 7.40  
Sale of common stock per share price   $ 7.40  
Common Stock [Member] | Cashless Exercise of Stock Options [Member]      
Stockholders Equity [Line Items]      
Share issued in exercise of stock options 5,230