Net Income (Loss) Per Common Share (Computation of Basic and Diluted Net Income (Loss) Per Common Share) (Details) (Parenthetical) - shares	Jun. 05, 2018	Jun. 05, 2018	May 25, 2018
Underwritten Public Offering [Member] \| Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Aggregate shares issued	1,408,163	183,673	1,224,490

Number of new stock issued during the period.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration