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Acquisition of Cooltech Corp - Additional Information (Detail) - Cooltech Corp. [Member] - USD ($)
3 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Jun. 01, 2018
Business Acquisition [Line Items]      
Stock price, per share     $ 1.00
Cash     $ 21,000
Accounts payable     $ 21,000
Gain recognized on pending claim $ 774,000 $ 503,000