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Legal Matters (Details)
1 Months Ended
Jun. 14, 2017
claim
Dec. 31, 2013
shareholder
Obligations Under Acquisition Agreement | Miyowa    
Loss Contingencies [Line Items]    
Number of former shareholders (shareholder) | shareholder   2
Pending Litigation | The Securities Law Actions    
Loss Contingencies [Line Items]    
Number of claims filed | claim 4