XML 64 R51.htm IDEA: XBRL DOCUMENT v3.10.0.1

Deferred Costs - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018
Deferred Costs [Abstract]
Deferred commission expected amortization period	2 years

X

- Definition

Deferred commission expected amortization period.

+ References

No definition available.

+ Details

Name:	spsc_DeferredCommissionExpectedAmortizationPeriod
Namespace Prefix:	spsc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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