SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	12 Months Ended			36 Months Ended
	Mar. 31, 2016 USD ($) Segment Customer	Mar. 31, 2015 USD ($) Customer	Mar. 31, 2014 USD ($) Customer	Mar. 31, 2015 USD ($) company
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment	5
Number of reportable segments | Segment	1
Unrecognized accounts receivable and deferred revenue	$ 2,000,000	$ 2,000,000		$ 2,000,000
Number of companies acquired | company				1
Amortization included as cost of product	0	0	$ 0
Capitalized software development costs	1,600,000	0		$ 0
Foreign currency gain (loss)	(1,500,000)	(1,400,000)	315,000
Advertising expense	6,400,000	3,100,000	$ 2,400,000
Contingently returnable consideration	16,131,000
Tax benefit of contingent purchase consideration	$ 7,293,000	$ 4,484,000		$ 4,484,000
Computer equipment and internal use software
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Minimum | Computer equipment and internal use software
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Direct customer | Customer concentration risk | Accounts receivable
Summary Of Significant Accounting Policies [Line Items]
Number of customers contributing more than 10% | Customer	1	1
Direct customer | Customer concentration risk | Accounts receivable | Minimum
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%
Direct customer | Customer concentration risk | Sales revenue
Summary Of Significant Accounting Policies [Line Items]
Number of customers contributing more than 10% | Customer	1	2	1
Direct customer | Customer concentration risk | Sales revenue | Minimum
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%
Indirect customer | Customer concentration risk | Accounts receivable
Summary Of Significant Accounting Policies [Line Items]
Number of customers contributing more than 10% | Customer	0	0
Indirect customer | Customer concentration risk | Accounts receivable | Minimum
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%
Indirect customer | Customer concentration risk | Sales revenue
Summary Of Significant Accounting Policies [Line Items]
Number of customers contributing more than 10% | Customer	0	0	0
Indirect customer | Customer concentration risk | Sales revenue | Minimum
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.00%	10.00%
Danaher | Customer concentration risk | Accounts receivable
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable	$ 44,200,000
Communications Business
Summary Of Significant Accounting Policies [Line Items]
Contingently returnable consideration	16,100,000
Tax benefit of contingent purchase consideration	$ 2,700,000