Consolidated Balance Sheets - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 272,291 $ 209,398
Trade accounts receivable, net of allowance for doubtful accounts of $60,000 at December 31, 2015 and $45,000 at December 31, 2014 2,798,353 3,536,747
Inventories 2,118,712 2,514,241
Prepaid expenses and other current assets 614,129 519,582
Total current assets 5,803,485 6,779,968
Assets held for sale, net 665,000 0
Property, plant and equipment, net 6,626,069 7,618,901
Intangible assets, net 18,645 134,022
Other assets 268,835 570,357
Total assets 13,382,034 15,103,248
Current liabilities:    
Revolving line of credit, current portion 0 2,071,495
Equipment line of credit, current portion 35,718 0
Term notes payable, current portion 589,635 490,341
Subordinated promissory notes 473,135 0
Accounts payable 1,553,388 1,857,156
Accrued expenses and other current liabilities 275,777 405,975
Customer deposits 93,407 98,110
Deferred revenue, current 272,837 228,363
Liabilities from discontinued operations, current 0 320,056
Total current liabilities 3,293,897 5,471,496
Long-term liabilities:    
Revolving line of credit, non-current portion 1,511,495 0
Equipment line of credit, non-current portion 301,132 0
Term notes payable, non-current portion 1,120,652 1,330,755
Subordinated promissory notes 0 445,452
Deferred revenue, non-current 272,181 610,430
Total long-term liabilities 3,205,460 2,386,637
Total liabilities $ 6,499,357 $ 7,858,133
Commitments and Contingencies
Shareholders' equity:    
Preferred stock, $0.001 par value; 2,000,000 shares authorized, none issued $ 0 $ 0
Common stock, $0.01 par value; 10,000,000 shares authorized; 3,926,491 issued, 2,801,639 outstanding at December 31, 2015 and 3,926,491 issued, 2,778,339 outstanding at December 31, 2014 39,265 39,265
Additional paid-in-capital 11,381,536 11,336,693
Treasury stock at cost, 1,124,852 shares at December 31, 2015 and 1,148,152 shares at December 31, 2014 (3,069,496) (3,133,883)
Accumulated other comprehensive income 0 42,502
Accumulated deficit (1,468,628) (1,039,462)
Total shareholders’ equity 6,882,677 7,245,115
Total liabilities and shareholders’ equity $ 13,382,034 $ 15,103,248