XML 14 R20.htm IDEA: XBRL DOCUMENT v3.19.3

RELATED PARTY TRANSACTIONS - Additional Information (Details)	6 Months Ended
	Sep. 30, 2019
RELATED PARTY TRANSACTIONS
Percentage Of Annual Management Fee	0.50%

X

- Definition

The percentage of annual management fee.

+ References

No definition available.

+ Details

Name:	bctciii_PercentageOfAnnualManagementFee
Namespace Prefix:	bctciii_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration