Consolidated Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash	$ 4,188,623	$ 5,871,738
Restricted cash	256,005	177,609
Accounts receivable, net	2,025,284	1,890,981
Inventory	1,651,246	1,206,377
Prepaid expenses and other current assets	261,324	350,289
Total current assets	8,382,482	9,496,994
Property, plant and equipment, net	4,805,640	4,573,841
Investment	484,930
Other assets	83,376	45,821
Goodwill	2,453,597	2,453,349
Other intangible assets, net	1,220,752	1,896,018
Total assets	17,430,777	18,466,023
Current liabilities:
Accounts payable	728,652	2,212,653
Accrued expenses and deferred revenue	1,105,718	1,290,593
Other current liabilities	2,953,629	2,996,310
Short-term debt	3,645,760
Current portion of long-term debt, net	966,506	1,202,335
Total current liabilities	9,400,265	7,701,891
Long-term debt, net	1,734,171	5,249,569
Other long-term liabilities	1,384,500	2,184,843
Deferred tax liability, net	125,982	45,619
Commitments and contingencies (Note 12)
Stockholders' equity
Common stock, $.02 par value; 200,000,000 shares authorized, 16,599,327 shares issued and outstanding (13,502,653 on December 31, 2016)	331,987	270,053
Additional paid-in capital	106,633,708	104,338,002
Subscription receivable	(300,000)
Accumulated other comprehensive loss	(23,069)	(45,343)
Accumulated deficit	(101,856,767)	(101,278,611)
Total stockholders' equity	4,785,859	3,284,101
Total liabilities and stockholders' equity	$ 17,430,777	$ 18,466,023

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.