Equity (Details Textual) - Common Class B [Member] - USD ($)		1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 05, 2016	Oct. 31, 2015	Jul. 23, 2015	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015	Jul. 31, 2015	Oct. 08, 2015
Equity (Textual)
Number of shares held in treasury stock, shares				41,723		41,723		41,723
Number of shares held in treasury stock, value						$ 480,392		$ 480,392
Stock-based compensation expense				$ 988,001	$ 845,961	1,585,799	$ 1,229,223
Unrecognized compensation cost related to non-vested restricted shares				$ 3,100,000		3,100,000
2016						1,000,000
2017						1,300,000
2018						700,000
2019						$ 127,000
2013 Plan [Member]
Equity (Textual)
Class B common stock available for the grant of awards									475,000
Davidi Jonas [Member]
Equity (Textual)
Stock issued during period as compensation, Shares						60,000
Stock issued during period, Shares			60,000
Stock issued during period, Value			$ 1,494,900
Employee [Member]
Equity (Textual)
Stock issued during period as compensation, Shares						28,000
Employee [Member] | Restricted Shares [Member]
Equity (Textual)
Restricted shares, granted		28,000
Restricted shares, Vested		4,000
Number of restricted shares issued, value		$ 1,052,000
Description of restricted shares vesting condition		The balance of the shares will vest as to one-third of the granted shares on each of October 16, 2016, 2017 and 2018.
Directors [Member]
Equity (Textual)
Stock issued during period as compensation, Shares						24,000
Directors [Member] | Restricted Shares [Member]
Equity (Textual)
Restricted shares, granted	24,000
Number of restricted shares issued, value	$ 418,000
Consultant [Member]
Equity (Textual)
Restricted shares, Vested						1,250
Consultant [Member] | March 16, 2016 [Member]
Equity (Textual)
Restricted shares, Vested						625
Consultant [Member] | June 13, 2016 [Member]
Equity (Textual)
Restricted shares, Vested						313
Consultant [Member] | October 17, 2016 [Member]
Equity (Textual)
Restricted shares, Vested						312