Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 4,069	$ 8,165
Marketable securities	3,905	0
Accounts receivable, net of allowance for doubtful accounts of $67 in 2018 and $64 in 2017	4,829	4,488
Prepaid expenses and other current assets	1,067	1,212
Total Current Assets	13,870	13,865
Property and equipment:
Computer software	3,914	3,614
Office furniture and equipment	1,997	1,961
Laboratory equipment	15,162	15,504
Leasehold improvements	2,445	2,402
Property, plant and equipment, gross	23,518	23,481
Accumulated depreciation and amortization	(13,341)	(11,670)
Property, plant and equipment, net	10,177	11,811
Other assets	927	832
Total Assets	24,974	26,508
Current Liabilities:
Accounts payable	682	398
Accrued expenses	2,962	2,870
Current portion of long-term debt	416	957
Total Current Liabilities	4,060	4,225
Long-term debt	1,212	2,420
Deferred tax liabilities, long-term	955	1,243
Total Liabilities	6,227	7,888
Commitments and Contingencies (Note 9)
Shareholders' Equity:
Preferred stock, $0.005 par value, 873 shares authorized, no shares issued or outstanding
Common stock, $0.005 par value; 50,000 shares authorized 6,175 shares issued in 2018 and 6,160 shares issued 2017, 5,507 shares outstanding in 2018 and 5,492 shares outstanding in 2017	31	31
Additional paid-in capital	31,523	31,022
Less - Treasury stock, at cost, 668 shares	(10,082)	(10,082)
Accumulated deficit	(1,326)	(2,113)
Accumulated other comprehensive loss	(1,399)	(238)
Total Shareholders' Equity	18,747	18,620
Total Liabilities and Shareholders' Equity	$ 24,974	$ 26,508