Quarterly report pursuant to Section 13 or 15(d)

Inventories (Schedule of Inventories) (Details)

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Inventories (Schedule of Inventories) (Details) - USD ($)
Jun. 30, 2018
Dec. 31, 2017
Inventories [Abstract]    
Finished goods $ 9,710,000 $ 8,056,000
Raw and processed materials 5,855,000 5,928,000
Inventories $ 15,565,210 $ 13,984,428