Note 2 - Summary of Significant Accounting Policies (Details Textual) - Customer Concentration Risk [Member] xbrli-pure in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Sales Revenue, Net [Member]
Number of Major Customers	0	0	0	0
Accounts Receivable [Member]
Number of Major Customers	0	0	0	0

Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.

No definition available.

Name:	dtrm_NumberOfMajorCustomers
Namespace Prefix:	dtrm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration