CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 36,506,624	$ 30,014,405
Accounts receivable, net of allowance for doubtful accounts of approximately $461,000 and $272,000, respectively	11,064,720	8,052,203
Inventory	7,315,942	5,458,840
Prepaid expenses and other	853,381	511,804
Total current assets	55,740,667	44,037,252
Property and equipment, net	2,197,039	1,494,247
Intangible assets	936,992	828,979
Total Assets	58,874,698	46,360,478
Current liabilities:
Borrowings under revolving loan agreement	4,000,000	4,025,023
Accounts payable and accrued expenses	8,952,061	7,002,165
Current maturities of long term obligations	735,017	20,899
Deferred revenue, current	31,668	33,282
Total current liabilities	13,718,746	11,081,369
Long Term Obligations, net of current maturities and deferred financing fees	19,905,286	20,265,745
Deferred revenue, noncurrent	68,631	92,215
Total liabilities	33,692,663	31,439,329
Shareholders' equity:
Common stock, $0.01 par value per share; 50,000,000 shares authorized; 34,350,329 and 33,008,865 shares issued and outstanding	343,503	330,088
Additional paid-in capital	153,167,817	132,474,884
Accumulated deficit	(128,329,285)	(117,883,823)
Total shareholders' equity	25,182,035	14,921,149
Total Liabilities and Shareholders' equity	$ 58,874,698	$ 46,360,478

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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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.