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Subsequent Events - Additional Information (Details) - USD ($)
 12 Months Ended
Jul. 01, 2018
Feb. 14, 2017
Jun. 30, 2018
Subsequent Event [Line Items]      
Number of units issued (in shares)   2,090,000  
Number of units issued, per unit ($ per shares)   $ 1.75  
Proceeds from issuance of common stock and warrants   $ 3,657,500  
Class of warrant description     Each warrant will have a two-year term and is exercisable at the following exercise prices: in the first year at $2.00 per share or in the second year at $2.25 per share.
Measurement Input Expected Term      
Subsequent Event [Line Items]      
Expected term of warrant   2 years  
Exercisable in First Year      
Subsequent Event [Line Items]      
Exercise price of warrants   $ 2.00  
Exercisable in Second Year      
Subsequent Event [Line Items]      
Exercise price of warrants   $ 2.25  
Subsequent Event      
Subsequent Event [Line Items]      
Number of units issued (in shares) 2,400,000    
Number of units issued, per unit ($ per shares) $ 1.25    
Proceeds from issuance of common stock and warrants $ 3,000,000    
Class of warrant description Each unit consists of one share of common stock and one warrant to purchase one-half of a share of common stock.    
Subsequent Event | Measurement Input Expected Term      
Subsequent Event [Line Items]      
Expected term of warrant 2 years    
Subsequent Event | Exercisable in First Year      
Subsequent Event [Line Items]      
Exercise price of warrants $ 1.30    
Subsequent Event | Exercisable in Second Year      
Subsequent Event [Line Items]      
Exercise price of warrants $ 1.50