CONSOLIDATED BALANCE SHEETS - USD ($)	Apr. 30, 2017	Apr. 30, 2016
Current assets:
Cash and cash equivalents	$ 1,659,318	$ 2,235,597
Total current assets	6,810,979	5,545,217
Accounts receivable, net of allowance of $247,000 and $92,000 at April 30, 2017 and 2016, respectively	4,199,674	2,886,154
Costs and estimated earnings in excess of billings on uncompleted contracts	410,826	357,210
Prepaid expenses and other current assets	41,135	66,256
Restricted cash	500,026	0
Property and equipment, net	322,643	237,800
Other assets	11,484	21,162
Total assets	7,145,106	5,804,179
Current liabilities:
Current portion of loans payable	52,946	53,996
Accounts payable and accrued expenses	1,790,256	2,071,765
Billings in excess of costs and estimated earnings on uncompleted contracts	2,105,797	1,358,289
Total current liabilities	3,948,999	3,484,050
Loans payable, net of current portion	124,559	94,825
Total liabilities	4,073,558	3,578,875
Commitments and contingencies
Stockholders' equity
Common stock - $0.0001 par value, 100,000,000 shares authorized, 3,352,159 and 2,691,055 shares issued and outstanding as of April 30, 2017 and 2016, respectively	335	269
Additional paid-in capital	89,003,669	85,940,389
Accumulated deficit	(87,077,134)	(84,820,940)
Total stockholders' equity	3,071,548	2,225,304
Total liabilities and stockholders’ equity	7,145,106	5,804,179
Convertible Series H [Member]
Stockholders' equity
Preferred stock	1,242	406,262
Convertible Series H-1 [Member]
Stockholders' equity
Preferred stock	437,530	699,324
Convertible Series H-2 [Member]
Stockholders' equity
Preferred stock	230,721	0
Convertible Series H-3 [Member]
Stockholders' equity
Preferred stock	$ 475,185	$ 0

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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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.