Acquisition of SafeOp Surgical, Inc. - Schedule of Allocation of Purchase Price (Details) - USD ($)	Sep. 30, 2018	Mar. 31, 2018
Liabilities assumed:
Goodwill	$ 14,469,000
SafeOp Surgical, Inc.
Assets acquired:
Accounts receivable	40,000
Inventory	192,000
Prepaid expenses and other current assets	89,000
Total current assets	321,000
Property and equipment, net	20,000
Other long-term assets	5,000
Intangible assets		$ 21,600,000
Total assets	21,906,000
Liabilities assumed:
Accounts payable	54,000
Accrued expenses	148,000
Deferred tax liability	2,341,000
Total liabilities	2,543,000
Goodwill	14,346,000
Total consideration transferred	33,709,000
SafeOp Surgical, Inc. | IPR&D
Assets acquired:
Intangible assets	8,400,000
SafeOp Surgical, Inc. | EPAD Tradename
Assets acquired:
Intangible assets	60,000
SafeOp Surgical, Inc. | Developed technology
Assets acquired:
Intangible assets	$ 13,100,000