Subsequent Events (Details Narrative) - shares	Apr. 12, 2017	Apr. 11, 2017
Subsequent Event [Member] \| 2008 Equity Incentive Plan [Member]
Increase in number of shares authorized	1,732,023	150,000

Number of additional shares authorized for issuance under an established share-based compensation plan.

No definition available.

Name:	usel_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseNumberOfSharesAuthorized1
Namespace Prefix:	usel_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration