Accrued Contract Cancellation Settlement (Details Narrative) - USD ($) $ in Thousands	Jan. 23, 2017	Dec. 31, 2016	Dec. 31, 2015
Accrued Contract Cancellation Settlement Disclosure [Abstract]
Accrued contract cancellation settlement liabilities	$ 1,000	$ 1,000

Represents the carrying value as of the balance sheet date of obligations incurred and payable, pertaining to contract cancellation.

No definition available.

Name:	snes_AccruedContractCancellationSettlementLiabilities
Namespace Prefix:	snes_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant