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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011
Operating activities: |  |  |
Net income | $ 11,148 | $ 10,553 | $ 5,874
Adjustments to reconcile net income to net cash provided (used) by operating activities: |  |  |
Depreciation | 1,851 | 1,685 | 1,334
Amortization | 228 | 339 | 314
Amortization of unrecognized prior service cost and actuarial losses | 893 | 392 | 293
Discount accretion on investments | (15) | (5) | (50)
Stock-based compensation expense | 576 | 611 | 478
Loss on disposal or sale of property, plant and equipment | 85 | 23 | 23
Deferred income taxes | (2,357) | 4,413 | (923)
(Increase) decrease in operating assets, net of acquisition: |  |  |
Accounts receivable | 2,264 | (2,844) | 155
Unbilled revenue | (415) | 1,613 | (10,672)
Inventories | (5,311) | 2,191 | (1,723)
Income taxes receivable/payable | 1,845 | (6,252) | 1,703
Prepaid expenses and other current and non-current assets | (300) | (105) | 63
Prepaid pension asset | (767) | (833) | (776)
Increase (decrease) in operating liabilities, net of acquisition: |  |  |
Accounts payable | 2,957 | (3,689) | 2,679
Accrued compensation, accrued expenses and other current and non-current liabilities | 59 | 172 | 461
Customer deposits | (255) | (5,626) | (9,498)
Long-term portion of accrued compensation, accrued pension liability and accrued postretirement benefits | (54) | (33) | (104)
Net cash provided (used) by operating activities | 12,432 | 2,605 | (10,369)
Investing activities: |  |  |
Purchase of property, plant and equipment | (1,655) | (3,243) | (1,979)
Proceeds from disposal of property, plant and equipment | 37 | 5 | 14
Purchase of investments | (83,984) | (32,896) | (155,717)
Redemption of investments at maturity | 73,000 | 39,920 | 202,310
Acquisition of Energy Steel & Supply Co. (See Note 2) |  | 384 | (17,899)
Net cash ( used) provided by investing activities | (12,602) | 4,170 | 26,729
Financing activities: |  |  |
Principal repayments on capital lease obligations | (85) | (81) | (68)
Issuance of common stock | 83 | 386 | 236
Dividends paid | (899) | (793) | (790)
Purchase of treasury stock |  | (221) | (874)
Excess tax deduction on stock awards | 43 | 247 | 120
Payment of contingent earn-out |  | (746) |
Net cash used by financing activities | (858) | (1,208) | (1,376)
Effect of exchange rate changes on cash | 33 | 57 | 51
Net (decrease) increase in cash and cash equivalents | (995) | 5,624 | 15,035
Cash and cash equivalents at beginning of year | 25,189 | 19,565 | 4,530
Cash and cash equivalents at end of year | $ 24,194 | $ 25,189 | $ 19,565

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- Definition The net cash inflow or outflow from investing activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3574-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 + Details
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