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Summary of Significant Accounting Policies (Details Textual)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
Customer / Customers
Jun. 30, 2017
USD ($)
Customer / Customers
Jun. 30, 2018
USD ($)
Customer / Customers
Jun. 30, 2017
USD ($)
Customer / Customers
Dec. 31, 2017
USD ($)
Summary of Significant Accounting Policies (Textual)          
Percentage of inventory valuation 50.00%   50.00%    
Goodwill $ 272,000   $ 272,000   $ 272,000
Stock based compensation     225,000 $ (73,000)  
Assets held for sale      
Gain on assets held for sale 1,563,000 1,563,000 1,563,000
Accounts receivable, net of allowance for doubtful accounts 9,863,000   9,863,000   7,681,000
Inventory, net of reserves 39,045,000   39,045,000   39,205,000
Prepaid and other assets 414,000   414,000   332,000
Property and equipment, net of accumulated depreciation 9,996,000   9,996,000   10,928,000
Accounts payable and accrued expenses 12,858,000   12,858,000   14,571,000
Deferred revenue 929,000   929,000   1,452,000
Notes payable & capital lease obligations 25,432,000   25,432,000   23,143,000
Deferred rent 1,325,000   1,325,000   1,322,000
Wmi Group [Member]          
Summary of Significant Accounting Policies (Textual)          
Assets held for sale         10,082,000
Liabilities directly associated to assets held for sale         2,795,000
Accounts receivable, net of allowance for doubtful accounts         2,217,000
Inventory, net of reserves         8,065,000
Prepaid and other assets         485,000
Property and equipment, net of accumulated depreciation         878,000
Accounts payable and accrued expenses         3,701,000
Deferred revenue         521,000
Notes payable & capital lease obligations         11,000
Deferred rent         125,000
ECC [Member]          
Summary of Significant Accounting Policies (Textual)          
Goodwill 109,000   109,000   109,000
NTW [Member]          
Summary of Significant Accounting Policies (Textual)          
Goodwill $ 163,000   $ 163,000   $ 163,000
Total net sales [Member]          
Summary of Significant Accounting Policies (Textual)          
Concentration Risks 45.70% 57.20% 49.20% 53.50%  
Number of Customers | Customer / Customers 2 3 2 3  
Accounts receivable [Member]          
Summary of Significant Accounting Policies (Textual)          
Concentration Risks     49.80% 55.50%  
Number of Customers | Customer / Customers     2 3