Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Mar. 31, 2011
Balance Sheets
Accounts receivable, allowance for uncollectible accounts	$ 15	$ 15
Common stock par value	$ 0.01	$ 0.01
Common stock, shares authorized	6,000,000	6,000,000
Common stock shares, issued	4,776,198	4,776,198
Common stock shares, outstanding	4,776,198	4,776,198