Inventories - Non-Current (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018
Inventories
Non-current inventory, 13 to 24 Months	$ 449
Non-current inventory, 25 to 36 Months	654
Total	$ 1,103	$ 1,041

Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(d))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_InventoryNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant