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Note 2 - Acquisitions and Dispositions (Details Textual)	1 Months Ended				12 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2017 CAD ($)	Jul. 31, 2016 USD ($)	Jul. 31, 2016 CAD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Jul. 06, 2015 USD ($)	Jul. 06, 2015 CAD ($)
Payments to Acquire Businesses, Net of Cash Acquired, Total					$ 15,518,000	$ 8,622,000	$ 33,382,000
Infitrak Acquisition [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low									$ 0
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High									$ 15,000,000
Business Combination, Contingent Consideration, Liability, Total								$ 9,271,000
Business Combination, Contingent Consideration, Earn-out Payment Amount	$ 4,558,000	$ 6,000,000	$ 4,594,000	$ 6,000,000
Infitrak Acquisition [Member] | Contingent Consideration Year 1 [Member] | Minimum [Member]
Business Combination, Contingent Consideration, Sliding Scale of Growth								30.00%	30.00%
Infitrak Acquisition [Member] | Contingent Consideration Year 1 [Member] | Maximum [Member]
Business Combination, Contingent Consideration, Sliding Scale of Growth								70.00%	70.00%
Infitrak Acquisition [Member] | Contingent Consideration Year 2 [Member] | Minimum [Member]
Business Combination, Contingent Consideration, Sliding Scale of Growth								15.00%	15.00%
Infitrak Acquisition [Member] | Contingent Consideration Year 2 [Member] | Maximum [Member]
Business Combination, Contingent Consideration, Sliding Scale of Growth								75.00%	75.00%

X

- Definition

Amount of earn out payment recognized arising from contingent consideration in a business combination.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of sliding scale of growth in gross profit that is used to determine the amount of contingent consideration in a business combination.

+ References

No definition available.

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X

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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- Definition

For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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