CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 69,085,000	$ 56,103,000
Restricted Cash, Current	1,663,000	8,500,000
Accounts receivable, net of allowances of $1,339 and $11,142 at December 31, 2018 and 2017, respectively	73,773,000	67,754,000
Inventories	29,166,000	32,956,000
Prepaid expenses	9,425,000	8,853,000
Contract with Customer, Asset, after Allowance for Credit Loss	19,494,000	16,513,000
Other current assets	6,125,000	5,917,000
Total current assets	208,731,000	196,596,000
Property, Plant and Equipment, Net	19,580,000	21,582,000
Intangible assets, net	0	4,432,000
Goodwill	32,643,000	32,643,000
Long-term deferred tax assets, net	7,479,000	1,158,000
Other long-term assets	6,113,000	9,432,000
Total assets	304,293,000	265,843,000
Current liabilities:
Accounts payable	39,888,000	39,239,000
Accrued compensation and benefits	19,524,000	21,967,000
Accrued expenses and other current liabilities	36,759,000	37,547,000
Income taxes payable	1,945,000	1,853,000
Short-term debt	30,554,000	1,405,000
Deferred revenues	83,589,000	85,662,000
Total current liabilities	212,259,000	187,673,000
Long-term debt	199,034,000	220,590,000
Long-term deferred tax liabilities, net	0	0
Long-term deferred revenues	14,312,000	13,939,000
Operating Lease, Liability, Noncurrent	28,127,000	0
Operating Lease, Right-of-Use Asset	29,747,000	0
Other long-term liabilities	5,646,000	10,302,000
Total liabilities	459,378,000	432,504,000
Commitments and contingencies (Note J)
Stockholders' deficit:
Preferred stock, $0.01 par value, 1,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.01 par value, 100,000 shares authorized; 42,339 shares issued and 41,949 shares and 41,356 shares outstanding at December 31, 2018 and 2017, respectively	430,000	423,000
Additional paid-in capital	1,027,824,000	1,028,924,000
Accumulated deficit	(1,179,409,000)	(1,187,010,000)
Treasury stock at cost, net of reissuances, 391 and 983 shares at December 31, 2018 and 2017, respectively	0	(5,231,000)
Accumulated other comprehensive loss	(3,930,000)	(3,767,000)
Total stockholders' deficit	(155,085,000)	(166,661,000)
Total liabilities and stockholders' deficit	$ 304,293,000	$ 265,843,000