XML 21 R24.htm IDEA: XBRL DOCUMENT
v2.4.0.6

UNDISTRIBUTED NET REALIZED GAINS (LOSSES) ON INVESTMENTS (Details) (USD $) | Sep. 30, 2012 | Mar. 31, 2012
--- | --- | ---
UNDISTRIBUTED NET REALIZED GAINS (LOSSES) ON INVESTMENTS [Abstract] |  |
Undistributed long term capital gains | $ 553,689 | $ 498,438

X
- Definition The accumulated net realized gain (loss) from investments during the period. + References No definition available. + Details
Name: | cswc_AccumulatedLongTermCapitalGain
Namespace Prefix: | cswc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | cswc_UndistributedNetRealizedGainsLossesOnInvestmentsAbstract
Namespace Prefix: | cswc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration