Label	Element	Value
Cumulative Effect Of New Accounting Principle In Period Of Adoptions	csii_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptions	$ 0
Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect Of New Accounting Principle In Period Of Adoptions	csii_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptions	101,000
AOCI Attributable to Parent [Member]
Cumulative Effect Of New Accounting Principle In Period Of Adoptions	csii_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptions	(101,000)
Common Stock [Member]
Cumulative Effect Of New Accounting Principle In Period Of Adoptions	csii_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptions	0
Additional Paid-in Capital [Member]
Cumulative Effect Of New Accounting Principle In Period Of Adoptions	csii_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptions	$ 0