Summary of Significant Accounting Policies - Concentration Risk (Details) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Mar. 31, 2017 USD ($) contract	Mar. 31, 2017 USD ($) contract	Jun. 30, 2016 USD ($)
Inventories
Excess and obsolete inventory reserve \| $	$ 2.5	$ 2.5	$ 2.6
Revenue \| Customer Concentration Risk
Concentration of revenues
Concentration risk (as a percent)	10.00%
Number of customers with concentration		1
Accounts Receivable \| Customer Concentration Risk
Concentration of revenues
Concentration risk (as a percent)		6.00%	9.00%
Number of contracts with concentration of risk	1	1

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

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