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Notes Payable - Additional Information (Detail) - HD Special-Situations III, L.P. - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 29, 2018
Nov. 13, 2017
Jun. 30, 2017
Mar. 23, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Mar. 28, 2018
Senior Secured Term Note                  
Debt Instrument [Line Items]                  
Debt principal amount       $ 7,000,000          
Debt principal repayment     $ 500,000            
Debt instrument, initial repayment date       Jun. 30, 2017          
Debt instrument, payment terms             $7.00 million principal amount Senior Secured Term Note (the “Note”) with principal of $0.50 million due and paid on June 30, 2017, with the remaining balance due 48 months after issuance for cash at par pursuant to a Note Purchase Agreement (the “Purchase Agreement”).    
Interest rate       11.50%          
Debt instrument, description incase of prepayment principal             The Note is subject to an interest “make-whole” provision such that any prepayment of the principal thereunder in excess of $1.50 million (the “Prepayment Threshold”) within one year of the date of issuance (the “Make-Whole Period”) shall be subject to prepayment premium. No prepayments were made during the Make-Whole Period which expired on March 28, 2018.    
Debt instrument prepayment of principal                 $ 0
Make whole expiration date             Mar. 28, 2018    
Debt instrument, prepayment of principal after Make Whole Period             After the one year Make- Whole Period the Note may be prepaid in part or in full with no penalty.    
Minimum principal reductions per month   $ 30,000              
Minimum principal reductions, begining period   2018-04              
Warrants issued to purchase of common stock   500,000              
Warrant exercise price per share   $ 2.26              
Warrants expiration period   2023-11              
Fair value of warrants recognized as an increase in additional paid-in-capital             $ 370,000    
Accretion of warrant discount         $ 10,000 $ 10,000 $ 30,000 $ 30,000  
Senior Secured Term Note | Minimum                  
Debt Instrument [Line Items]                  
Prepayment Threshold       $ 1,500,000          
Senior Secured Term Note | Purchase Agreement                  
Debt Instrument [Line Items]                  
Debt, remaining principal payable period             48 months    
Senior Secured Term Note | Loan Agreement | M&I Brazil | Former Chairman of AETI                  
Debt Instrument [Line Items]                  
Interest rate 10.00%                
Line of credit facility, agreement date Mar. 29, 2018                
Line of credit facility, maximum borrowing capacity $ 300,000                
Loan facility drawn and outstanding         $ 200,000   $ 200,000    
Debt instrument, interest rate terms             the interest rate on the loan facility is 10.0%, per annum, payable each quarter.    
Debt instrument, maturity date Jun. 07, 2019                
Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Proceeds from sale of note available for working capital and general business purposes       $ 1,000,000