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Note 6 - Other Receivables (Details Textual) - USD ($) $ in Millions	Jan. 31, 2017	Jan. 31, 2016
Amounts Recoverable from Funds Held in Escrow	$ 0.6	$ 0.2

X

- Definition

Amount recoverable from funds held In escrow related to acquisitions.

+ References

No definition available.

+ Details

Name:	dsgx_AmountsRecoverableFromFundsHeldInEscrow
Namespace Prefix:	dsgx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant