Note 8 - Other Assets - Components of Other Current Assets (Details) - USD ($)	Dec. 31, 2019	Jun. 30, 2019
Deposits and prepaid expenses	$ 225,428	$ 462,215
Other current assets	47,386	83,890
Total	$ 272,814	$ 546,105

Amount of asset related to consideration paid in advance for costs that provide economic benefits and carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied within a future period of one year or the normal operating cycle, if longer.

No definition available.

Name:	cncg_PrepaidExpenseAndDepositsAssetsCurrent
Namespace Prefix:	cncg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant